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Related Experiment Video

Updated: Jul 28, 2025

Measuring the Behavioral Effects of Intraocular Scatter

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Published on: February 18, 2021

Knowledge, perception and practice towards blue-blocking lenses among optometrists.

Shonraj Ballae Ganeshrao¹, Nagarajan Theruveethi¹, Krithica Srinivasan¹

¹Department of Optometry, Manipal College of Health Professions, Manipal Academy of Higher Education, Manipal, India.

Clinical & Experimental Optometry

|May 31, 2023

Summary

Indian optometrists often prescribe blue-blocking lenses based on advertisements, not scientific evidence. Developing clinical guidelines is crucial for evidence-based practice regarding blue light protection.

Keywords:

Blue blocking lens blue light optometrist practice survey

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Area of Science:

Ophthalmology
Optometry
Public Health

Background:

Increased use of digital devices and LED lighting necessitates understanding blue light exposure.
Blue-blocking lenses are commercially available, but clinical guidelines for their prescription in India are lacking.
Practitioners' knowledge, attitudes, and perceptions significantly influence prescription patterns.

Purpose of the Study:

To assess the knowledge, perception, and practice patterns of Indian optometrists regarding blue-blocking lenses.
To identify factors influencing the prescription of blue-blocking lenses among eye care practitioners in India.

Main Methods:

A cross-sectional online survey was conducted among Indian optometrists.
The survey included 29 items across four domains: knowledge, practice, perception, and demographics.
Descriptive analysis and logistic regression were used to analyze the data.

Main Results:

Approximately 50% of participants demonstrated adequate knowledge of blue light.
52% of optometrists prescribed blue-blocking lenses frequently.
Prescribing likelihood increased significantly when practitioners perceived blue light as a cause of computer vision syndrome or believed in adequate scientific evidence.

Conclusions:

Prescribing practices for blue-blocking lenses in India are not consistently evidence-based, with advertisements often cited as the primary information source.
Awareness, knowledge, education, and practice type did not significantly impact prescription decisions.
There is a clear need for evidence-based guidelines to standardize the prescription of blue-blocking lenses.