Cargando…
Study of change in contrast sensitivity in relation to depth of ablation after wavefront optimized myopic laser-assisted in situ keratomileusis
PURPOSE: The aim of this work was to study the change in contrast sensitivity (CS) in relation to depth of stromal ablation after wavefront-optimized (WFO) myopic laser in situ keratomileusis (LASIK). METHODS: This was as prospective, longitudinal, comparative study. The study participants were divi...
Autores principales: | , , , , , , |
---|---|
Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
Wolters Kluwer - Medknow
2020
|
Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7856953/ https://www.ncbi.nlm.nih.gov/pubmed/33229680 http://dx.doi.org/10.4103/ijo.IJO_1399_20 |
_version_ | 1783646347783569408 |
---|---|
author | Heralgi, Mallikarjun M Kavitha, V Dwivedi, Manisha Preethi, V Roopasreez, B V Rajashekar, J Deokar, Ankit |
author_facet | Heralgi, Mallikarjun M Kavitha, V Dwivedi, Manisha Preethi, V Roopasreez, B V Rajashekar, J Deokar, Ankit |
author_sort | Heralgi, Mallikarjun M |
collection | PubMed |
description | PURPOSE: The aim of this work was to study the change in contrast sensitivity (CS) in relation to depth of stromal ablation after wavefront-optimized (WFO) myopic laser in situ keratomileusis (LASIK). METHODS: This was as prospective, longitudinal, comparative study. The study participants were divided into two groups: Group 1 ≤50 μ ablation depth; 60 eyes and group 2 >50 μ ablation depth; 60 eyes. All underwent WFO LASIK. Uncorrected and corrected distance visual acuity (UDVA and CDVA) and CS were measured preoperatively and postoperatively at 1 week, 2 weeks, and 2 and 6 months. Two-way repeated-measures analysis of variance (ANOVA), Unpaired t test and one-way repeated measures ANOVA were used to test differences across time periods within each treatment group. A value of P < 0.05 was considered as statistically significant. RESULTS: The mean ablation depths in groups 1 and 2 were 39.30 μ ± 7.22 μ and 69.90 μ ± 12.09 μ, respectively; the maximum depth was 94.62 μ. In group 1, the preoperative mean CS was 1.91 ± 0.07, which improved postoperatively at 1 week (1.93 ± 0.06) and remained stable in subsequent follow-ups (1.94 ± 0.05). In group 2, the mean CS preoperatively was 1.87 ± 0.12, which postoperatively at 1 week and 6 months were 1.93 ± 0.07 and 1.94 ± 0.03, respectively (P < 0.05). Between the groups, preoperative CS was significantly different (P = 0.04), but the change in CS post-LASIK was insignificant (P > 0.05). CONCLUSION: There was a significant improvement in CS after WFO myopic LASIK in all patients irrespective of ablation depth (up to 94.62 μ). |
format | Online Article Text |
id | pubmed-7856953 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2020 |
publisher | Wolters Kluwer - Medknow |
record_format | MEDLINE/PubMed |
spelling | pubmed-78569532021-02-05 Study of change in contrast sensitivity in relation to depth of ablation after wavefront optimized myopic laser-assisted in situ keratomileusis Heralgi, Mallikarjun M Kavitha, V Dwivedi, Manisha Preethi, V Roopasreez, B V Rajashekar, J Deokar, Ankit Indian J Ophthalmol Original Article PURPOSE: The aim of this work was to study the change in contrast sensitivity (CS) in relation to depth of stromal ablation after wavefront-optimized (WFO) myopic laser in situ keratomileusis (LASIK). METHODS: This was as prospective, longitudinal, comparative study. The study participants were divided into two groups: Group 1 ≤50 μ ablation depth; 60 eyes and group 2 >50 μ ablation depth; 60 eyes. All underwent WFO LASIK. Uncorrected and corrected distance visual acuity (UDVA and CDVA) and CS were measured preoperatively and postoperatively at 1 week, 2 weeks, and 2 and 6 months. Two-way repeated-measures analysis of variance (ANOVA), Unpaired t test and one-way repeated measures ANOVA were used to test differences across time periods within each treatment group. A value of P < 0.05 was considered as statistically significant. RESULTS: The mean ablation depths in groups 1 and 2 were 39.30 μ ± 7.22 μ and 69.90 μ ± 12.09 μ, respectively; the maximum depth was 94.62 μ. In group 1, the preoperative mean CS was 1.91 ± 0.07, which improved postoperatively at 1 week (1.93 ± 0.06) and remained stable in subsequent follow-ups (1.94 ± 0.05). In group 2, the mean CS preoperatively was 1.87 ± 0.12, which postoperatively at 1 week and 6 months were 1.93 ± 0.07 and 1.94 ± 0.03, respectively (P < 0.05). Between the groups, preoperative CS was significantly different (P = 0.04), but the change in CS post-LASIK was insignificant (P > 0.05). CONCLUSION: There was a significant improvement in CS after WFO myopic LASIK in all patients irrespective of ablation depth (up to 94.62 μ). Wolters Kluwer - Medknow 2020-12 2020-11-23 /pmc/articles/PMC7856953/ /pubmed/33229680 http://dx.doi.org/10.4103/ijo.IJO_1399_20 Text en Copyright: © 2020 Indian Journal of Ophthalmology http://creativecommons.org/licenses/by-nc-sa/4.0 This is an open access journal, and articles are distributed under the terms of the Creative Commons Attribution-NonCommercial-ShareAlike 4.0 License, which allows others to remix, tweak, and build upon the work non-commercially, as long as appropriate credit is given and the new creations are licensed under the identical terms. |
spellingShingle | Original Article Heralgi, Mallikarjun M Kavitha, V Dwivedi, Manisha Preethi, V Roopasreez, B V Rajashekar, J Deokar, Ankit Study of change in contrast sensitivity in relation to depth of ablation after wavefront optimized myopic laser-assisted in situ keratomileusis |
title | Study of change in contrast sensitivity in relation to depth of ablation after wavefront optimized myopic laser-assisted in situ keratomileusis |
title_full | Study of change in contrast sensitivity in relation to depth of ablation after wavefront optimized myopic laser-assisted in situ keratomileusis |
title_fullStr | Study of change in contrast sensitivity in relation to depth of ablation after wavefront optimized myopic laser-assisted in situ keratomileusis |
title_full_unstemmed | Study of change in contrast sensitivity in relation to depth of ablation after wavefront optimized myopic laser-assisted in situ keratomileusis |
title_short | Study of change in contrast sensitivity in relation to depth of ablation after wavefront optimized myopic laser-assisted in situ keratomileusis |
title_sort | study of change in contrast sensitivity in relation to depth of ablation after wavefront optimized myopic laser-assisted in situ keratomileusis |
topic | Original Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7856953/ https://www.ncbi.nlm.nih.gov/pubmed/33229680 http://dx.doi.org/10.4103/ijo.IJO_1399_20 |
work_keys_str_mv | AT heralgimallikarjunm studyofchangeincontrastsensitivityinrelationtodepthofablationafterwavefrontoptimizedmyopiclaserassistedinsitukeratomileusis AT kavithav studyofchangeincontrastsensitivityinrelationtodepthofablationafterwavefrontoptimizedmyopiclaserassistedinsitukeratomileusis AT dwivedimanisha studyofchangeincontrastsensitivityinrelationtodepthofablationafterwavefrontoptimizedmyopiclaserassistedinsitukeratomileusis AT preethiv studyofchangeincontrastsensitivityinrelationtodepthofablationafterwavefrontoptimizedmyopiclaserassistedinsitukeratomileusis AT roopasreezbv studyofchangeincontrastsensitivityinrelationtodepthofablationafterwavefrontoptimizedmyopiclaserassistedinsitukeratomileusis AT rajashekarj studyofchangeincontrastsensitivityinrelationtodepthofablationafterwavefrontoptimizedmyopiclaserassistedinsitukeratomileusis AT deokarankit studyofchangeincontrastsensitivityinrelationtodepthofablationafterwavefrontoptimizedmyopiclaserassistedinsitukeratomileusis |