Moderator
Marguerite B. McDonald, MD, FACS
Panelists
Richard Tipperman, MD
Tushya Om Parkash, MS
Viewing Papers
Expand a paper title to the right to view the paper abstract and authors. Use the video link to jump to that poster in the session.
Presenting Author
Donghun Lee, PhD, MS
Purpose
To investigate changes in refractive error following horizontal muscle surgery and to analyze the relationship between these changes and axial length.
Methods
Patients with intermittent exotropia who underwent bilateral lateral rectus recession (LR group) or unilateral lateral rectus recession with medial rectus resection (RR group) were investigated prospectively. The patients were followed for at least 3 months postoperatively; refractive error, axial length, mean corneal astigmatism, anterior chamber depth, corneal thickness, and intraocular pressure were evaluated at each examination. Postoperative changes in both groups were compared.
Results
A total of 64 eyes were included�34 eyes in the LR group and 30 eyes in the RR group. In both groups refractive error, axial length, and mean corneal astigmatism significantly increased 1 day postoperatively, although the changes in all three parameters returned to their preoperative values within 1 month of surgery and remained stable thereafter for the duration of the follow-up period. There was a negative correlation between changes in axial length and refractive error toward myopia in the 64 eyes on postoperative day 1 (coefficient r=-0.637; P<0.001). changes="" in="" refractive="" error="" and="" axial="" length="" were="" significantly="" larger="" in="" the="" rr="" than="" in="" the="" lr="" group="" 1="" day="">
Conclusion
Horizontalmuscle surgery induces a transientmyopic shift.This is thought to be due to axiallength elongation as well as changes in corneal astigmatism
Presenting Author
Akshaya L Thananjeyan, MBBS
Co-Authors
Chandra Bala MBBS, PhD, FRANZCO
Purpose
1. To evaluate the difference in pre-operative undilated and dilated ocular higher order aberrations (HOAs) when the undilated pupil is 6mm or more. 2. To review outcomes of treatment using cyloplegic ocular aberration data with ray trace lasik.
Methods
Innoveyes guided ray trace LASIK creates an individualized ablation profile for treatment using features including tomography, wavefront aberrometry, ACD, AL, and corneal thickness. Undilated wavefront aberrometry is routinely used to create this profile. In this study, we assessed eyes which underwent both undilated (6mm pupil size or greater) and dilated preoperative wavefront aberrometry to evaluate differences in ocular HOAs. We also present post operative outcomes of a different subset of eyes which underwent ray trace based LASIK using cycloplegic ocular wavefront data.
Results
A cohort of 102 eyes which achieved 6mm or greater undilated pupil size were assessed. Mean undilated and dilated pupil size per eye was 6.87�0.49mm and 8.07�0.53mm respectively. No significant difference was observed between undilated and dilated RMS values for 3rd, 4th, 5th and 6th order and total HOAs. There was a statistically significant difference in Z5?1 (paired t test; p=0.02) and Z60 (paired t test; p<0.001). a="" cohort="" of="" 23="" eyes="" (12="" od,="" 12="" os)="" which="" underwent="" cycloplegic="" wavefront="" treatment="" were="" assessed="" 3="" months="" post="" operatively.="" udva="" of="" 20/20="" vision="" or="" better="" was="" achieved="" in="" 96%="" of="" eyes.="" no="" eyes="" lost="" 2="" or="" more="" lines="" of="" cvda.="" 91.3%="" achieved="" within="" 0.5d="" of="">
Conclusion
There is no significant difference in HOAs between undilated and dilated Innoveyes guided wavefront assessment where pupil size is 6mm or greater. Cycloplegic wavefront treatment is a possible treatment strategy for dealing with instrument myopia during ray trace LASIK.
Presenting Author
Chandra Bala, MBBS, PhD, FRANZCO
Co-Authors
Akshaya Thananjeyan MBBS
Purpose
To evaluate the incidence and amount of instrument myopia/accommodation during whole eye aberration measurement and its adjustment during ray trace based LASIK
Methods
Innoveyes guided ray trace LASIK creates an individualized ablation profile for treatment using tomography, wavefront aberrometry, ACD, AL, and corneal thickness. Patients may accommodate during Innoveyes Sitemap pre-operative whole eye aberration assessment. Post operative outcomes of patients undergoing Innoveyes guided ray trace LASIK receiving surgeon adjusted treatment due to accommodation during Innoveyes Sitemap analysis were reviewed.
Results
In 1283 eyes (647 OD, 636 OS) which underwent ray trace LASIK over an 18 month period, average difference between manifest SEQ and wavefront SEQ refraction was 0.28�0.39D (range: -1.28 � 4.35). Instrument myopia of 0.5D or greater was found in 21% of eyes. 95 eyes (39 OD, 56 OS) which had SEQ adjusted to within 0.5D of manifest SEQ for treatment were assessed 3 months post operatively. UCDVA of 20/20 vision or better was achieved in 98% of eyes. No eyes lost 2 or more lines of CVDA. 90.5% of eyes achieved within 0.5D of emmetropia.
Conclusion
Instrument myopia of 0.5D or greater was seen in 21% of eyes. Surgeon adjustment is a possible treatment strategy for dealing with instrument myopia during ray trace LASIK.
Presenting Author
Seongjun Lee, MD, PhD
Co-Authors
Sin Woo Bae MD
Purpose
To compare the objective and subjective visual quality after Small-incision Lenticule Extraction (SMILE) using VISUMAX 500 and VISUMAX 800 for myopia
Methods
This retrospective study included 64 eyes of 32 patients who underwent the SMILE using Visumax 500 (VISUMAX 500 group), and 38 eyes of 20 patients who underwent the SMILE using Visumax 800 (VISUMAX 800 group). Visual acuity, refractive, pachymeter, lenticule diameter, ocular optical quality (OQAS, Optical Quality Analysis System, Visiometrics SL), and corneal higher-order aberrations (Pentacam HD) were recorded preoperatively and for 6 months postoperatively. Contrast sensitivity (CGT-1000, Takagi Seiko Co. Ltd.) and quality of vision (QoV) questionnaire were analyzed at 3, 6 months postoperatively.
Results
The VISUMAX 800 had fewer horizontal coma (0.09�0.32 vs -0.06�0.32; p=0.020, VISUMAX 500 vs VISUMAX 800, respectively) than the VISUMAX 500 but there was no significant difference in the total HOAs and total coma between the two groups after surgery. Analysis of the OQAS test revealed that the scores of objective scatter index (OSI, 1.04 � 0.59 vs 0.83 � 0.35; p=0.03) and a modulation transfer function (MTF, 30.91 � 10.82 vs 35.67 � 8.28; p=0.014) in VISUMAX 800 were better than in VISUMAX 500. The two groups demonstrated no significant differences in contrast sensitivity and the scores of the quality of vision questionnaire. There were no complications in either group.
Conclusion
Although VISUMAX 800 SMILE provided better horizontal coma and objective quality of vision than VISUMAX 500 SMILE, there was no difference in subjective visual quality. Both VISUMAX 500 SMILE and VISUMAX 800 SMILE are safe and effective procedures in the correction of myopia.
Presenting Author
Ceren Ece Semiz, MD
Co-Authors
Faruk Semiz MD, Njomza H MD, Fetih Furkan Arslan MD
Purpose
To investigate the improvement in visual acuity and patient satisfaction after small-incision lenticule extraction (SMILE) in pseudophakic (trifocal intraocular lens, IOL) patients with residual myopic refraction after cataract surgery.
Methods
This retrospective study involved 82 eyes of 76 consecutive patients (aged 56�79) who underwent ZEISS AT LISA tri 839MP IOL implantation at various clinics from 2017 to 2018. YAG laser capsulotomy was performed 3 months post-cataract surgery, followed by SMILE surgery 1 month later. Patients had a history of hyperopia, axial length < 23 mm, and had residual myopia (-1.0 to -2.25 D) and astigmatism (-0.75 to -1.75 D). Exclusions comprised high myopia, retinal/corneal/ocular disease, irregular astigmatism, glaucoma, macular degeneration and dry eye. Patients were followed up for 1 year. We assessed visual acuity, satisfaction, and laser vision correction outcomes. ClinicalTrials NCT04693663.
Results
Following SMILE surgery, there was a significant decrease in residual myopic refractive error (spherical) from -2.08 � 0.28 [-2.25 to -1.0] preoperatively to -0.25 � 0.20 [-0.5 to 0] at 1 year postoperatively (p < 0.001). Uncorrected distance visual acuity improved from 0.65 � 0.08 [0.52�0.7] logMAR preoperatively to 0.09 � 0.02 [0.05�0.1] logMAR at 1 month postoperatively (p < 0.001), 0.09 � 0.02 [0.05�0.1] logMAR at 6 months postoperatively, and 0.06 � 0.02 [0.05�0.1] logMAR at 12 months postoperatively (p < 0.001). Patient satisfaction levels regarding reading, night driving, and computer use significantly improved post-SMILE surgery
Conclusion
SMILE is a reliable and efficient method for addressing residual refraction after cataract surgery. It offers quick results without complications, leading to increased patient satisfaction.
Presenting Author
Karl G. Stonecipher, MD, ABO
Co-Authors
Ronald Krueger MSE, MD
Purpose
To evaluate the safety and effectiveness of laser-assisted in situ keratomileusis (LASIK) performed with Teneo 317 Model 2 using the latest laser ablation algorithm (Proscan 1.28 SW) for the correction of high myopia (-6.0 D or higher).
Methods
This prospective, multicenter, open-label, non-randomized, single-arm study included 158 eyes that underwent LASIK with the Teneo 317 Model 2 (version 1.28 US SW, Bausch & Lomb) for the correction of high myopia (-6.0 D or higher). Inclusion criteria were eyes with preoperative best-corrected distance visual acuity (CDVA) of 20/25 or better, manifest refraction spherical equivalent (MRSE) between -6.0 D and -11.50 D with or without astigmatism (cylinder between 0.0 D and -3.0 D). Outcome measures were uncorrected and corrected distance visual acuity (UDVA, CDVA), MRSE and astigmatic outcomes, 9 months postoperatively.
Results
At postoperative 9 months, 94.8% of eyes achieved UDVA of 20/25 or better, and 100% achieved 20/40 or better. While 67.1% of the eyes showed no change in the lines of CDVA, 32.2% of the eyes gained 1 or more lines of CDVA. Mean MRSE improved from -7.96 � 1.22 D preoperatively to -0.07 � 0.39 D postoperatively with 87.7% and 98.1% of eyes achieving residual refractive error within �0.50 D and �1.00 D, respectively. The percentage of eyes with a residual refractive cylinder of ?0.50 D and ?1.00 D were 90.3% and 99.4%, respectively. Refractive outcomes were stable from postoperative 3 to 9 months.
Conclusion
LASIK performed with the Teneo 317 Model 2 excimer laser is safe and effective for correcting high myopia (with or without astigmatism), resulting in good visual and refractive outcomes that were stable through the last follow-up at 9 months.
Presenting Author
Ronald R. Krueger, MD, MSE
Co-Authors
Andrew Moyes MD, Michael Gordon MD, Thomas Clinch MD, Vance Thompson MD
Purpose
To evaluate safety and efficacy of ray tracing-based LASIK surgery for the correction of myopia in eyes with and without astigmatism.
Methods
In this prospective, single-arm, multicenter, U.S. FDA study, patients were enrolled with ?21 years of age and myopia of ?-11.0 D, with or without astigmatism ?-4.5 D. For each eye, a virtual 3D model and individualized ablation profile was developed using data collected from the InnovEyes Sightmap and processed by the WaveLight Plus ray-tracing algorithm. Efficacy endpoints included the percentage of eyes achieving MRSE within 1.0 D of emmetropia and UDVA of 20/40 or better at refractive stability. Safety endpoints included the percentages of eyes that lost ?2 lines CDVA at refractive stability versus preoperative CDVA and non-flap related ocular serious adverse events (SAE).
Results
Of the 168 patients (336 eyes) enrolled, 161 patients (322 eyes) completed the study. Refractive stability was achieved at 3 months. At 3 months postop, 98.5% of eyes had MRSE within 1.0 D of target and 92% were within 0.5 D. 100% of eyes achieved UDVA of 20/40 or better, 92.3% of eyes achieved 20/20 or better, 66.9% of eyes 20/16 or better, and 20.7% of eyes 20/12.5 or better. No eyes lost ?2 lines of CDVA, and there were no new safety signals at 3 months. No ocular SAEs or non-ocular adverse device effects were reported.
Conclusion
Ray tracing-guided LASIK with and individualized ablation profile was safe and effective for correcting myopia with and without astigmatism, producing good, stable visual outcomes.
Presenting Author
Adir C. Sommer, MD
Co-Authors
Dror Ben Ephraim Noyman MD, BSc, Gur Munzer BA, Eyal Cohen MD, Michael Mimouni MD, Margarita Safir MD, Waseem Nasser MD, PhD, Tzahi Sela BScOptom, Igor Kaiserman MD
Purpose
To compare the visual and refractive outcomes of laser in situ keratomileusis (LASIK) surgery in patients with mild versus high myopia.
Methods
A retrospective study was conducted on 12,074 eyes from 6,880 patients who underwent LASIK surgery at Care-Vision Laser Centers, Tel Aviv, between January 2013 and December 2023. Patients were categorized into two groups based on preoperative myopia severity: mild (0.5 to 3.0 diopters) and high (?6.0 diopters). Preoperative and postoperative outcomes, including uncorrected visual acuity (UCVA), best-corrected visual acuity (BCVA), spherical equivalent (SEQ), and cylinder measurements, were compared between the groups. Data were analyzed using IBM SPSS, and adjustments were made for baseline and intraoperative differences.
Results
11,261 (93.3%) were in the mild myopia group, and 813 (6.7%) were in the high myopia group. Mean SEQ was -6.8D for high myopia and -2.0D for mild myopia. The high myopia group had steeper preoperative corneas (Kmax 44.49D vs. 44.21D, P<0.001) and="" worse="" preoperative="" ucva="" and="" bcva="" (0.01="" vs.="" 0.17,=""><0.001; 0.93="" vs.="" 0.96,=""><0.001). postoperative="" measurement="" timing="" was="" similar="" (49.1="" vs.="" 47.32="" days,="" p="0.129)." the="" high="" myopia="" group="" had="" worse="" postoperative="" ucva="" (0.91="" vs.="" 0.97,=""><0.001), bcva="" (0.94="" vs.="" 0.98,=""><0.001), higher="" cylinder="" (-0.08d="" vs.="" -0.05d,=""><0.001), and="" myopic="" seq="" (-0.12d="" vs.="" -0.07d,="" p="0.015)," all="" significant="" after="" adjusting="" for="" confounders.="" retreatment="" rates="" did="" not="" differ="" (p="">
Conclusion
LASIK surgery provides good outcomes for both low and high myopia. However, patients with high myopia achieve slightly less favorable results in terms of UCVA and BCVA. Despite this, the similar retreatment rates suggest that the overall satisfaction and improvement in vision for high myopia patients are comparable to those with mild myopia.
Presenting Author
Ramy Rashad, MD, MBA
Co-Authors
Edward Manche MD
Purpose
The aim of this study was to assess the effect of long-term orthokeratology lens wear on visual outcomes post refractive surgery.
Methods
A retrospective medical records review of patients aged 21 years or older with a history of orthokeratology lens wear who underwent refractive surgery between January 2009 and August 2024 at Byers Eye Institute at Stanford University was conducted. Baseline statistical information was collected, along with data on orthokeratology lens wear prior to and following the initial refractive consultation leading up to surgery. The primary outcome measure was uncorrected visual acuity at 1, 4 and 12 months postoperatively.
Results
A total of 34 patients (68 eyes) were included in the study. The duration of orthokeratology lens wear ranged from 1 year to 20 years. The duration of pre-operative lens discontinuation to topography normalization ranged from 5 weeks to 156 weeks. A total of 51 eyes underwent laser in situ keratomileusis, 14 eyes underwent photorefractive keratectomy and 3 eyes underwent small incision lenticule extraction. At post-op month 1, 77.9% of eyes achieved a visual acuity of 20/20 or better, 92.6% achieved a visual acuity of 20/25 or better and 98.5% achieved a visual acuity 20/40 or better. These outcomes were sustained or improved at later follow up intervals, if available.
Conclusion
Patients with a history of long-term orthokeratology wear can have excellent visual outcomes following refractive surgery. Careful preoperative evaluation and monitoring of topography post-orthokeratology lens discontinuation is critical to ensure surgery success.
Presenting Author
Ronald R. Krueger, MD, MSE
Co-Authors
George Waring MD
Purpose
To evaluate the safety and effectiveness of laser-assisted in situ keratomileusis (LASIK) performed with Teneo 317 Model 2 using the latest laser ablation algorithm (Proscan 1.28 SW) in a subgroup of patients with preexisting corneal astigmatism of 1.50 D or higher.
Methods
This prospective, multicenter, open-label, non-randomized, single-arm study included 71 eyes that underwent LASIK with the Teneo 317 Model 2 (version 1.28 US SW, B&L) for the correction of myopia/myopic astigmatism. Inclusion criteria were eyes with preoperative best corrected distance visual acuity (CDVA) of 20/25 or better, manifest refraction spherical equivalent (MRSE) between -1.00 to -11.50 D, and preoperative astigmatism of -1.50 to -3.00 D, without static cyclotorsion compensation. Outcome measures were uncorrected and corrected distance visual acuity (UDVA, CDVA), MRSE and astigmatism assessed at 9 months postoperatively.
Results
At postoperative 9 months, 87.3% of eyes achieved UDVA of 20/25 or better, and 98.6% achieved 20/40 or better. While 70.4% of the eyes showed no change in the lines of CDVA, 28.1% of the eyes gained 1 or more lines of CDVA. None of the eyes lost any line of CDVA. Mean MRSE improved from -6.28 +/-2.44 D preoperatively to -0.07 +/-0.32 D postoperatively with 90.1% and 98.6% of eyes achieving residual refractive error within +/- 0.50 D and +/- 1.00 D, respectively. The percentage of eyes with a residual refractive cylinder of 0.50 D and 1.00 D or less were 85.9% and 97.2%, respectively. Refractive outcomes were stable from postoperative 3 to 9 months.
Conclusion
LASIK with Teneo 317 Model 2 excimer laser in patients with preoperative astigmatism of 1.50 D or higher is safe and effective, resulting in good visual and refractive outcomes that were stable through the last follow-up at 9 months. In the real world, with static cyclotorsion compensation, the astigmatic outcomes will likely improve further.
Presenting Author
David Sung Yong Kang, MD
Co-Authors
Kangyoon Kim MD, Byunghoon Chung MD, Tae-im Kim PhD, MD, Samuel Arba Mosquera PhD
Purpose
To evaluate the influence of changing corridor between cap and optic zone on visual comes and corneal higher-order aberrations (HOAs) after keratorefractive lenticule extraction (KLEx) for myopia.
Methods
This study was a retrospective case series of 500 eyes that underwent KLEx (VisuMax 800, Zeiss) for compound myopia. The corridor width was 0.4 mm in 250 patients (Group 1) and conventional size of 1.0 mm in 250 patients (Group 2). Visual parameters and refractive parameters were compared for two months postoperatively. Corneal HOAs and corneal biomechanical parameters were measured using the hybrid anterior segment optical coherence tomographer MS-39 and Scheimpflug tonometer Corvis ST, respectively.
Results
The mean uncorrected distance visual acuity and corrected distance visual acuity were comparable for both groups at 1 day and 2 weeks postoperatively. The induction of total corneal HOAs and coma was significantly lower in Group 1 (P<0.05). however,="" the="" induction="" of="" spherical="" aberrations="" was="" lower="" in="" group="" 2=""><0.05). the="" decrease="" in="" arth="" was="" larger="" in="" group="" 1="" postoperatively="">< />
Conclusion
KLEx with a narrow corridor width demonstrated comparable visual and refractive outcomes to those with a wider corridor. It showed favorable results, with reduced induction of total HOAs and coma. However, the induction of spherical aberrations and the decrease in ARTh value postoperatively were larger in the narrow corridor group.
Presenting Author
Supriya S. Sri Ganesh, MBBS, MS
Co-Authors
Sri Ganesh MS
Purpose
To assess visual and refractive outcomes of 1500 eyes that underwent SMILE with the VisuMax 800 femtosecond laser
Methods
This retrospective study includes 1500 eyes (770 patients) younger than 45 years with CDVA of 20/20 or better who were treated with SMILE using VisuMax 800. The surgery was performed by a single experienced surgeon using a standard technique and 3 month follow up data was analysed.
Results
1500 eyes with mean age of 27.25 � 4.746 years with 39.48% males and 60.52% females were included in this study. At 3 months, 98% of eyes had UDVA 20/20 or better with an efficacy index of 1.01. Mean pre-operative SE was -4.170� 1.860D, and at 3 months it was -0.025 � 0.120D (p=0.000). 18.4% had gain of 1 line of CDVA and 9.2% had loss of 1 line with safety index 1.61. Post-operative SE was within � 0.5D and � 1D in 99% and 100% eyes respectively. 98.4% and 100% eyes showed astigmatism �0.5D and �1D respectively. No eyes lost 2 or more lines of CDVA. At 3 months, OSI was 0.844�0.486, which was close to preoperative values (0.733�0.871), with a mean change of 0.11.
Conclusion
The VisuMax 800, with centration guidance (CentraLign�) and cyclotorsion adjustment features (OcuLign�), showed safe and effective outcomes for the treatment of myopia and myopic astigmatism in a large cohort of 1500 eyes.
Presenting Author
Zhao Liu, MD, PhD
Purpose
To observe the clinical outcomes of Phorcides analytic engine (PAE, PHORCIDES LLC, St. Paul, United States) assisted topography-guided LASIK for treatment of myopia and astigmatism in virgin eyes that were not in compliance with FDA criteria.
Methods
A retrospective clinical study. Enrolled virgin eyes with myopia and astigmatism underwent topography-guided LASIK from December 2019 to March 2021. Inclusion criteria: 1) The eyes not in compliance with FDA criteria: a. eyes with refractive astigmatism (RA) ? 2.00D, the difference in the astigmatic axis between RA and Topolyzer-measured astigmatism (TMA) exceed 5 degrees. b. eyes with RA ? 1.75D, the difference in the astigmatic axis between the RA and TMA exceed 10 degrees. c. the difference in astigmatic power between RA and TMA exceed 0.75D. 2) The surgical refraction data were all followed the recommended results with the PAE. 3) Enrolled eyes all completed follow up for half a year.
Results
32 cases (42 eyes) were included in the study for analysis. The postoperative UDVA exceeded the preoperative CDVA in 19 eyes (45%). The postoperative SEQ of all eyes was -0.50D to +0.50D, and the postoperative SEQ of 23 eyes (55%) was -0.13D to +0.13D. 33 eyes (79%) had postoperative astigmatism ? 0.25D. there is no statistical significance between TIA and SIA. Postoperative astigmatism axial deviation ranged from -5� to +5� in 33 eyes (79%). Compared to pre-operation, the postoperative total HOA and spherical aberrations increased; the postoperative coma aberrations had no change; the postoperative trefoil aberrations decreased, the Strehl ratio increased significantly.
Conclusion
Using the PAE to assist topography-guided LASIK for treatment of myopia and astigmatism in virgin eyes that were not in compliance with FDA criteria can achieve good therapeutic effects. Postoperative UDVA exceeded preoperative CDVA in nearly half of the eyes, and the quality of postoperative corneal imaging was improved.
Presenting Author
Victor Derhartunian, MD
Co-Authors
Ivan Gabric MD, Samuel Arba Mosquera PhD, Thomas Magnago MA
Purpose
To evaluate the performance of auto-centration for corneal lenticule extraction treatment on a new commercial femtosecond laser system
Methods
Pre- and 3-m post-op tomographies from 48 eyes who underwent klex were collected. The centre of mass of the central 9-mm of the pre- to post-operative differences has been calculated and it has been considered as an unbiased estimate of the centration. Corneal tomographies were obtained from MS-39 as data matrices in polar/cylindrical coordinates based on constant radial and angular steps, and treatments performed using klex (SCHWIND ATOS). XY plots for all treatments and two representative metrics (pachymetry and refractive equivalent power) split in OD/OS are presented along with statistical summary. The differences in pupil & limbus center positions have been used as a sanity check.
Results
In the results it was shown, that 80% of the treatments were within 200�m of decentration. Analysis of the change in the k-reading was reflecting the planned refractive change and spherical aberration, coma, and higher order RMS revealed no relevant differences pre- to postop. After three months all eyes were within �1D of the SEQ and 94% showed an astigmatism of less than ?0,5D.
Conclusion
Automated centration and cyclotorsion compensation for lenticule creation is an effective approach to refine the results of myopic astigmatism showing an excellent centration. Refractive data of SmartSight treatments with cylinder up to 4,25 dioptre showed excellent outcome.
Presenting Author
Sonu Goel, DNB, None
Co-Authors
Purnima Dhand MS, MBBS, Madhav Goel MBBS
Purpose
retrospective analysis of outcomes for myopia and myopic astigmatism post keartoferactive surgery interns of ucva . bcva, efficacy,,post op refractive error , hoa,residual astigmatism ,quality of vision
Methods
retrospective analysis of 1500 eyes post smile pro for myopia and myopic astigmatism , all patients above 19 years ,normal Topo ,Pentacam ,pachymetry ,no systemic illness, non diabetic ,stable refractive error for more than 1 year ,normal retina were included , pregnancy , diabetes ,connective tissue disorders , glaucoma were exclusion criterions . patients were subjected to smile pro surgery on visumax 800 using 2KHZ system with average treatment time of 8 secs . Post operative visual outcome along with spherical equivalent was assessed on day 1 , day 7 and 3month.
Results
1500 eyes of 761 patients 305 M/ 456 F . mean age 26.46 � 5.7 yrs ranging from 18 -50 yrs pre op Mean sph equ was 4.31 � 2.27 ds , range of 0.5-10.25 ds. preopUCVA of LogMAR 1.05 � 0.2. Post op sph eq was 0.12 � 0.22 ds ranging from 0-1.12 ds. Post op UCVA was 0 � 0.04 Log Mar on day 1 and 0 � 0.03 Log mar on day 7, 1 month and 3rd month respectively. UCVA was 20/20 or better in 94.95 % on day 1 and increased to 98.80 % of the eyes on day 7 and gain of one line was seen in 5.50% of patients on follow up ,the safety and efficacy index was close to 1,.01 and .94 respectively significant ,fall in HOA from .2to 1.3 specially coma from 0.1 to 0.07 ,only 2 patients had suction losses
Conclusion
lenticule extraction on visumax smile 800 is safe in terms of min to no suction loss ,better centration and cyclotorsion alignment boiling to excellent refractive outcomes
To log in, click the teal "Login" button in the upper right-hand corner of this page. If you are logged in but still do not have access, please check your 2025 Annual Meeting registration.
