1. Understanding Vision, Take part in the ZEISS Online Vision Screening Check and test the quality of your vision. ZEISS Online Vision Screening, Oct (2017). https://www.zeiss.co.in/vision-care/better-vision/zeiss-online-vision-screening-check.html
2. A Glossary of Eye Tests and Exams, Eye Health, Reference. https://www.webmd.com/eye-health/eye-tests-exams#1
3. M.X. Repka, D. Gudgel, Home eye test for children and adults. March (2020). https://www.aao.org/eye-health/tips-prevention/home-eye-test-children-adults
4. 6 Eye Tests In A Basic Eye Exam. https://allabouteyes.com/6-eye-tests-basic-eye-exam/
5. D. Turbert, M.D. Brenda Pagan-Duran, Eye exam and vision testing basics (2018). https://www.aao.org/eye-health/tips-prevention/eye-exams-101