# Effect of Blue Light Filter Intraocular Lens (IOL) on Colour Vision

## TL;DR

This study examines how blue light filter intraocular lenses affect color vision in Sudanese patients, finding a significant impact on photopic color perception.

## Contribution

The study is the first to investigate the effect of blue light filter IOLs on color vision in Sudanese patients.

## Key findings

- 81 out of 103 patients (78.64%) achieved normal D15 color vision test results.
- There was a significant effect (P=.00) on photopic color vision perception.
- Gender differences in test results were found to be statistically insignificant (P=.933).

## Abstract

Purpose

The objective of this study is to know the effect of blue light filter (BF) intraocular lenses (IOL) on colour vision of Sudanese patiens as BF IOLs are relatively new in Sudan and its effect on Sudanese patients is not yet studied.

Methods

This was a descriptive cross-sectional observational study. Data collection was done through interview and pretested structured questionnaire containing three sections: (i) personal data, (ii) past medical and ocular surgical history, and (iii) visual acuity (VA), the anterior and posterior segment exam result, and the D15 photopic color vision test result.

Results

In this study, 206 eyes of 103 patients were enrolled. Of them, 57 (55.3%) were females and 46 (44.7 %) were males. The mean age of the participants was 58.38 years±11.488 (SD). Furthermore, 81 patients (78.64%) achieved normal D15 color vision test results, while 22 patients (21.4%) had abnormal results. There was a significant effect (P=.00) on photopic color vision perception. Finally, the gender-wise performance showed an insignificant difference (P=.933) with 78.3% of the males having normal D15 color vision test and the females having slightly better results with 78.9 %.

Conclusions

The results suggested that implantation of BF IOLs has a significant effect on photopic color vision perception.