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Perceived benefits of first, second, and both eyes cataract surgery: a patient-reported outcomes study

Poster Details

First Author: J.Huang CHINA

Co Author(s):    J. Khadka   R. Gao   Q. Wang   K. Pesudovs           

Abstract Details


To measure the perceived benefits of cataract surgery in first eye, second eye and both eyes using the Rasch analysis guided re-engineered version of the Hong Kong Quality of Life questionnaire (HKQ).


Eye Hospital, Wenzhou Medical University, Wenzhou, China.


The HKQ was interviewer-administered to participants at baseline (pre-surgery) and 12 months follow-up (post-surgery). Rasch analysis was used to assess and improve psychometric properties of the HKQ using the pre-surgery data. The responsiveness of the HKQ was assessed on the stacked-up pre- and post-surgery data of those who completed the HKQ at the follow-up assessment. Responsiveness was reported with the effect size (ES) for the overall, first eye, second eye, both eyes and with/without ocular/systemic co-morbidities.


199 cataract patients completed the HKQ during pre-surgery assessment. The majority (83.9%) came for first eye surgery either undergone surgery in one eye (45.2%) or both eyes (38.7%). Rasch analysis guided psychometric assessment and optimization resulted into a 15-item HKQ with promising psychometric properties including adequate measurement precision, item fit, targeting, with no evidence of item bias. 82 patients completed the HKQ at 12 months post-surgery follow-up. There were statistically significant gains in the HKQ scores for all groups with the highest gain for those who had undergone both eyes cataract surgery. This group demonstrated the large effect size (ES=2.61).


The 15-item HKQ was valid, psychometrically sound instrument which was highly sensitive to measure cataract surgery outcomes. As the both eyes surgery provided better patient-reported outcomes, it might be logical to routinely offer this option to patients.

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