Indian Journal of Ophthalmology - Case Reports

OPHTHALMIC IMAGE
Year
: 2021  |  Volume : 1  |  Issue : 3  |  Page : 455-

Birefringence in ophthalmic lenses


Neelima Manchikanti1, Srikanth Maseedupalli2,  
1 Consultant Optometrist, L V Prasad Eye Institute, Hyderabad, Telangana, India
2 L V Prasad Eye Institute, Hyderabad, Telangana, India

Correspondence Address:
Srikanth Maseedupalli
Optometrist, Brien Holden Institute of Optometry and Vision Sciences, L V Prasad Eye Institute, Gullapalli Pratibha Rao Campus, Don Bosco Nagar PO, Hyderabad - 500 086, Telangana
India




How to cite this article:
Manchikanti N, Maseedupalli S. Birefringence in ophthalmic lenses.Indian J Ophthalmol Case Rep 2021;1:455-455


How to cite this URL:
Manchikanti N, Maseedupalli S. Birefringence in ophthalmic lenses. Indian J Ophthalmol Case Rep [serial online] 2021 [cited 2022 Dec 5 ];1:455-455
Available from: https://www.ijoreports.in/text.asp?2021/1/3/455/320006


Full Text



This picture is a rare sight of the birefringence in a surfaced polycarbonate lens. Stress in the lens shifts the isotropic material to anisotropic,[1] leading to the birefringence which is an optical property of the material. This depends upon both light polarization and propagation,[2] seen in anisotropic materials such as tightly fitted and insufficiently-cooled ophthalmic lenses (injection molding). It is visualized through a polariscope, appears as a field of colorful-fringes [Figure 1]. Polycarbonate lenses are made by injection molding have low optical quality and can cause difficulty in adaptation to the wearer. Therefore, it is vital to check stress marks before dispensing.{Figure 1}

Financial support and sponsorship

Hyderabad Eye Research Foundation.

Conflicts of interest

There are no conflicts of interest.

References

1Alonso J, Gómez-Pedrero JA, Quiroga JA. Lens Manufacturing and Measurement in Modern Ophthalmic Optics. Cambridge UniversityPress; 2019. p. 355-404.
2Alonso J, Gómez-Pedrero JA, Quiroga JA. Ophthalmic materials in Modern Ophthalmic Optics. Cambridge UniversityPress: University Printing House, Cambridge CB2 8BS, United Kingdom 2019. p. 1-20.