Self retaining contact lens system for vitreous surgery
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 mi...
| Main Authors: | , |
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| Format: | Article |
| Language: | English |
| Published: |
Wolters Kluwer Medknow Publications
2004-01-01
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| Series: | Indian Journal of Ophthalmology |
| Subjects: | |
| Online Access: | http://www.ijo.in/article.asp?issn=0301-4738;year=2004;volume=52;issue=1;spage=67;epage=71;aulast=Chalam |
| _version_ | 1818934911217696768 |
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| author | Chalam Kakarla Shah Vinay |
| author_facet | Chalam Kakarla Shah Vinay |
| author_sort | Chalam Kakarla |
| collection | DOAJ |
| description | 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. |
| first_indexed | 2024-12-20T05:11:48Z |
| format | Article |
| id | doaj.art-655010063d97405da8a39bba1028afe9 |
| institution | Directory Open Access Journal |
| issn | 0301-4738 |
| language | English |
| last_indexed | 2024-12-20T05:11:48Z |
| publishDate | 2004-01-01 |
| publisher | Wolters Kluwer Medknow Publications |
| record_format | Article |
| series | Indian Journal of Ophthalmology |
| spelling | doaj.art-655010063d97405da8a39bba1028afe92022-12-21T19:52:15ZengWolters Kluwer Medknow PublicationsIndian Journal of Ophthalmology0301-47382004-01-015216771Self retaining contact lens system for vitreous surgeryChalam KakarlaShah VinayWe 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.http://www.ijo.in/article.asp?issn=0301-4738;year=2004;volume=52;issue=1;spage=67;epage=71;aulast=ChalamContact lensvitreous surgeryself-retainingvitrectomy |
| spellingShingle | Chalam Kakarla Shah Vinay Self retaining contact lens system for vitreous surgery Indian Journal of Ophthalmology Contact lens vitreous surgery self-retaining vitrectomy |
| title | Self retaining contact lens system for vitreous surgery |
| title_full | Self retaining contact lens system for vitreous surgery |
| title_fullStr | Self retaining contact lens system for vitreous surgery |
| title_full_unstemmed | Self retaining contact lens system for vitreous surgery |
| title_short | Self retaining contact lens system for vitreous surgery |
| title_sort | self retaining contact lens system for vitreous surgery |
| topic | Contact lens vitreous surgery self-retaining vitrectomy |
| url | http://www.ijo.in/article.asp?issn=0301-4738;year=2004;volume=52;issue=1;spage=67;epage=71;aulast=Chalam |
| work_keys_str_mv | AT chalamkakarla selfretainingcontactlenssystemforvitreoussurgery AT shahvinay selfretainingcontactlenssystemforvitreoussurgery |