Evaluation of a visual acuity eHealth tool in cataract patients

Joukje C Wanten*, Noël J C Bauer, Janneau L J Claessens, Thomas van Amelsfort, Tos T J M Berendschot, Robert P L Wisse, Rudy M M A Nuijts

*Corresponding author for this work

Research output: Contribution to journalArticleAcademicpeer-review


PURPOSE: To validate the Easee web-based tool for the assessment of visual acuity in patients who underwent cataract surgery.

SETTING: University Eye Clinic Maastricht, the Netherlands.

DESIGN: Prospective method comparison study.

METHODS: Subjects aged between 18 and 69 years old who underwent cataract surgery on one or both eyes at the Maastricht University Medical Center+ were eligible to participate in this study. The uncorrected (UDVA) and corrected visual acuity (CDVA) assessments were performed using the web-based tool (index-test) and conventional ETDRS and Snellen charts (reference tests). The outcomes of the different tests were expressed in logMAR and a difference of <0.15 logMAR was considered clinically acceptable.

RESULTS: A total of 46 subjects with 75 operated eyes were included in this study. The difference of the UDVA between the web-based tool and ETDRS or Snellen was -0.05±0.10 logMAR (p=<0.001, [0.15; -0.26]) and -0.04±0.15 logMAR (p=0.018, [0.24; -0.33]), respectively. For the CDVA, these differences were -0.04±0.08 logMAR (p=<0.001, [0.13; -0.21]) and -0.07±0.10 logMAR (p=<0.001, [0.13; -0.27]), respectively. The Pearson correlation coefficients between the web-based tool and ETDRS were maximally 0.94 and compared to Snellen 0.92. In total, 73% to 88% of the visual acuity measurement differences were within 0.15 logMAR.

CONCLUSION: The web-based tool was validated for the assessment of visual acuity in patients who underwent cataract surgery and showed clinically acceptable outcomes in up to 88% of patients. The majority of participants had a positive attitude towards the web-based tool, which requires basic digital skills.

Original languageEnglish
Pages (from-to)278-284
JournalJournal of Cataract and Refractive Surgery
Issue number3
Early online date6 Dec 2022
Publication statusPublished - 2023

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