Indian Journal of Ophthalmology

OPHTHALMOLOGY PRACTICE
Year
: 2004  |  Volume : 52  |  Issue : 1  |  Page : 67--71

Self retaining contact lens system for vitreous surgery


Kakarla V Chalam, Vinay A Shah 
 Department of Ophthalmology, University of Florida College of Medicine, Jacksonville, FL 32209, USA

Correspondence Address:
Kakarla V Chalam
Department of Ophthalmology, University of Florida College of Medicine, Jacksonville, FL 32209
USA

We describe the principle and design of a new self-retaining contact lens system for vitreous surgery. The system has three lenses: the plano-concave, prism and magnifying lens. This system is based on the principle of a direct imaging contact lens, designed for a 150-200mm focal length operating microscope. The contact lenses are designed to have an inferior concave surface [radius of curvature (ROC) 7.7mm], modified by the addition of four footplates to provide stability and centration during vitreous surgery. The lenses are used with a drop of viscoelastic material placed between the concave surface of the contact lens and cornea. This induces negative suction and helps retain the lens in position during surgery. These specially designed lenses provide a stable, well-centered, high-resolution, magnified view of the fundus. This system eliminates the need for a skilled assistant or for suturing the lens to the sclera during vitreous surgery.


How to cite this article:
Chalam KV, Shah VA. Self retaining contact lens system for vitreous surgery.Indian J Ophthalmol 2004;52:67-71


How to cite this URL:
Chalam KV, Shah VA. Self retaining contact lens system for vitreous surgery. Indian J Ophthalmol [serial online] 2004 [cited 2019 Dec 8 ];52:67-71
Available from: http://www.ijo.in/article.asp?issn=0301-4738;year=2004;volume=52;issue=1;spage=67;epage=71;aulast=Chalam;type=0