Has Snellen Chart Lost the Battle to ETDRS in Cataract Surgery Visual Acuity Evaluation?

This study was designed to explore practical differences between visual acuity (VA) scores measured on Snellen chart versus ETDRS chart, to grade cataracts using LOCS III system, and to compare VA on both charts depending on cataract grade and type. Prospective evaluation of uncorrected and best-...

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Main Authors: Sanja Petrović Pajić, Tiana Petrović, Milenko Stojković, Slađana Anđelić
Format: Article
Language:English
Published: Sestre Milosrdnice University hospital, Institute of Clinical Medical Research 2021-01-01
Series:Acta Clinica Croatica
Subjects:
Online Access:https://hrcak.srce.hr/file/393679
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author Sanja Petrović Pajić
Tiana Petrović
Milenko Stojković
Slađana Anđelić
author_facet Sanja Petrović Pajić
Tiana Petrović
Milenko Stojković
Slađana Anđelić
author_sort Sanja Petrović Pajić
collection DOAJ
description This study was designed to explore practical differences between visual acuity (VA) scores measured on Snellen chart versus ETDRS chart, to grade cataracts using LOCS III system, and to compare VA on both charts depending on cataract grade and type. Prospective evaluation of uncorrected and best-corrected visual acuity was carried out on the eye scheduled for cataract surgery preoperatively and postoperatively on the Snellen and ETDRS charts. The study was carried out at Department of Eye Diseases, Clinical Center of Serbia, during a two-year period. Inclusion criteria were met by 540 patients who underwent testing, surgery, data collection and analysis. The mean VA score was better on ETDRS than on Snellen chart. The mean difference was 6.05 letters or 1.21 lines. VA results correlated with all types of cataract regardless of the chart used, with the highest statistical significance (p<0.0001) for subcapsular cataract. The ETDRS chart was found to be more discriminative and precise than Snellen chart, especially for poor VA.
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spelling doaj.art-9afa7d8809f64953a8598b91c8dad6b52024-04-15T17:32:02ZengSestre Milosrdnice University hospital, Institute of Clinical Medical ResearchActa Clinica Croatica0353-94661333-94512021-01-0160.3.44144910.20471/acc.2021.60.03.15Has Snellen Chart Lost the Battle to ETDRS in Cataract Surgery Visual Acuity Evaluation?Sanja Petrović PajićTiana PetrovićMilenko StojkovićSlađana AnđelićThis study was designed to explore practical differences between visual acuity (VA) scores measured on Snellen chart versus ETDRS chart, to grade cataracts using LOCS III system, and to compare VA on both charts depending on cataract grade and type. Prospective evaluation of uncorrected and best-corrected visual acuity was carried out on the eye scheduled for cataract surgery preoperatively and postoperatively on the Snellen and ETDRS charts. The study was carried out at Department of Eye Diseases, Clinical Center of Serbia, during a two-year period. Inclusion criteria were met by 540 patients who underwent testing, surgery, data collection and analysis. The mean VA score was better on ETDRS than on Snellen chart. The mean difference was 6.05 letters or 1.21 lines. VA results correlated with all types of cataract regardless of the chart used, with the highest statistical significance (p<0.0001) for subcapsular cataract. The ETDRS chart was found to be more discriminative and precise than Snellen chart, especially for poor VA.https://hrcak.srce.hr/file/393679Visual acuityETDRS chartSnellen chartLOCS IIIAge-related cataract
spellingShingle Sanja Petrović Pajić
Tiana Petrović
Milenko Stojković
Slađana Anđelić
Has Snellen Chart Lost the Battle to ETDRS in Cataract Surgery Visual Acuity Evaluation?
Acta Clinica Croatica
Visual acuity
ETDRS chart
Snellen chart
LOCS III
Age-related cataract
title Has Snellen Chart Lost the Battle to ETDRS in Cataract Surgery Visual Acuity Evaluation?
title_full Has Snellen Chart Lost the Battle to ETDRS in Cataract Surgery Visual Acuity Evaluation?
title_fullStr Has Snellen Chart Lost the Battle to ETDRS in Cataract Surgery Visual Acuity Evaluation?
title_full_unstemmed Has Snellen Chart Lost the Battle to ETDRS in Cataract Surgery Visual Acuity Evaluation?
title_short Has Snellen Chart Lost the Battle to ETDRS in Cataract Surgery Visual Acuity Evaluation?
title_sort has snellen chart lost the battle to etdrs in cataract surgery visual acuity evaluation
topic Visual acuity
ETDRS chart
Snellen chart
LOCS III
Age-related cataract
url https://hrcak.srce.hr/file/393679
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