Related Experiment Video
Updated: Mar 25, 2026

Binocular Dynamic Visual Acuity in Eyeglass-Corrected Myopic Patients
Published on: March 29, 2022
Evaluation of spectacle independence with the Dutch Patient-Reported Spectacle Independence Questionnaire
Nicolaas J Reus1, Fallon van Dorst, Marjolein J C Kooijman-de Groot
1From the Department of Ophthalmology, Amphia Hospital, Breda, the Netherlands (Reus, van Dorst, Kooijman-de Groot, Weenen, Porro); Health Services Research, Acumen Health Research Institute, Ann Arbor, Michigan (Morlock); University of New South Wales, Sydney, Australia (Pesudovs).
Spectacle independence varies significantly among different intraocular lens (IOL) types, with trifocal IOLs offering the highest rates. The Patient-Reported Spectacle Independence Questionnaire-NL is useful for clinical evaluation using dichotomous scoring.
Area of Science:
- Ophthalmology
- Patient-Reported Outcome Measures
Background:
- Spectacle independence is a key outcome in cataract surgery and refractive lens exchange.
- Patient-reported outcome measures (PROMs) are crucial for evaluating functional vision and quality of life after lens implantation.
Purpose of the Study:
- To evaluate spectacle independence in healthy individuals and cataract patients with various intraocular lens (IOL) types and refractive targets.
- To assess the utility of a Dutch translation of The Patient-Reported Spectacle Independence Questionnaire (PRSIQ-NL) in measuring spectacle independence.
Main Methods:
- A prospective, observational, cross-sectional study was conducted with 361 participants.
- Participants included healthy individuals and cataract patients implanted with various IOLs (monofocal, enhanced monofocal, toric monofocal, extended depth-of-focus, trifocal).
- The Patient-Reported Spectacle Independence Questionnaire (PRSIQ) was translated into Dutch (PRSIQ-NL) and administered.
Main Results:
- Dichotomous scoring revealed significant differences in spectacle independence rates across IOL types, with trifocal IOLs showing the highest rate (57%).
- Extended depth-of-focus (EDOF) IOLs showed 17% spectacle independence, while monofocal and toric monofocal IOLs showed lower rates (5% and 0%, respectively).
- Rasch analysis indicated the PRSIQ-NL was multidimensional and unsuitable for interval-scaled measurements.
Conclusions:
- The PRSIQ-NL effectively demonstrated significant differences in self-reported spectacle independence across different IOL types and refractive targets using dichotomous scoring.
- While not suitable for interval scaling, the PRSIQ-NL is a valuable tool for clinical and research applications to evaluate spectacle independence.
- Trifocal IOLs appear to provide higher rates of spectacle independence compared to other IOL types evaluated.

