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Contact lens in keratoconus.

Rathi VM, Mandathara PS, Dumpati S - Indian J Ophthalmol (2013)

Bottom Line: Contact lenses are required for the visual improvement in patients with keratoconus.Various contact lens options, such as rigid gas permeable (RGP) lenses, soft and soft toric lenses, piggy back contact lenses (PBCL), hybrid lenses and scleral lenses are availble.A Medline search was carried out for articles in the English language with the keywords keratoconus and various contact lenses such as Rose k lens, RGP lens, hybrid lens, scleral lens and PBCL.

View Article: PubMed Central - PubMed

Affiliation: Cornea Services; Bausch and Lomb Contact lens Centre, L V Prasad Eye Institute, Hyderabad, India.

ABSTRACT
Contact lenses are required for the visual improvement in patients with keratoconus. Various contact lens options, such as rigid gas permeable (RGP) lenses, soft and soft toric lenses, piggy back contact lenses (PBCL), hybrid lenses and scleral lenses are availble. This article discusses about selection of a lens depending on the type of keratoconus and the fitting philosophies of various contact lenses including the starting trial lens. A Medline search was carried out for articles in the English language with the keywords keratoconus and various contact lenses such as Rose k lens, RGP lens, hybrid lens, scleral lens and PBCL.

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Haptic resting on sclera and the corneal clearance indicating adequate vault
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Figure 6: Haptic resting on sclera and the corneal clearance indicating adequate vault

Mentions: True scleral lenses rest on the sclera and do not touch the cornea and limbus, leaving a clear area between the contact lens and the cornea. There is renewed interest over the last few years because of the availability of high Dk material and newer designs.[13252627] These lenses are indicated when all other contact lenses fail to improve the vision or because of inability to get an optimal fit with RGP, RGP intolerance, 3 and 9 O’ clock staining of the cornea, vascularisation with PBCL, advanced keratoconus or scarring in the cornea[25262728] [Fig. 6]. Even associated diseases such as VKC should not deter one from trying these lenses. The contraindications are presence of corneal oedema, acute hydrops and post filtration surgery. The fitting of the lens can be resumed after the hydrops heals.[29] The other indication for these lenses is prior to penetrating keratoplasty. The lenses can be non fenestrated or fenestrated. We describe the fitting of nonfenestrated scleral contact lens (PROSE, Prosthetic Replacement of the Ocular Surface Ecosystem, Boston Foundation for Sight, Needham Heights, Boston, MA, USA) that are filled with fluid prior to insertion in the eye.


Contact lens in keratoconus.

Rathi VM, Mandathara PS, Dumpati S - Indian J Ophthalmol (2013)

Haptic resting on sclera and the corneal clearance indicating adequate vault
© Copyright Policy - open-access
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC3775075&req=5

Figure 6: Haptic resting on sclera and the corneal clearance indicating adequate vault
Mentions: True scleral lenses rest on the sclera and do not touch the cornea and limbus, leaving a clear area between the contact lens and the cornea. There is renewed interest over the last few years because of the availability of high Dk material and newer designs.[13252627] These lenses are indicated when all other contact lenses fail to improve the vision or because of inability to get an optimal fit with RGP, RGP intolerance, 3 and 9 O’ clock staining of the cornea, vascularisation with PBCL, advanced keratoconus or scarring in the cornea[25262728] [Fig. 6]. Even associated diseases such as VKC should not deter one from trying these lenses. The contraindications are presence of corneal oedema, acute hydrops and post filtration surgery. The fitting of the lens can be resumed after the hydrops heals.[29] The other indication for these lenses is prior to penetrating keratoplasty. The lenses can be non fenestrated or fenestrated. We describe the fitting of nonfenestrated scleral contact lens (PROSE, Prosthetic Replacement of the Ocular Surface Ecosystem, Boston Foundation for Sight, Needham Heights, Boston, MA, USA) that are filled with fluid prior to insertion in the eye.

Bottom Line: Contact lenses are required for the visual improvement in patients with keratoconus.Various contact lens options, such as rigid gas permeable (RGP) lenses, soft and soft toric lenses, piggy back contact lenses (PBCL), hybrid lenses and scleral lenses are availble.A Medline search was carried out for articles in the English language with the keywords keratoconus and various contact lenses such as Rose k lens, RGP lens, hybrid lens, scleral lens and PBCL.

View Article: PubMed Central - PubMed

Affiliation: Cornea Services; Bausch and Lomb Contact lens Centre, L V Prasad Eye Institute, Hyderabad, India.

ABSTRACT
Contact lenses are required for the visual improvement in patients with keratoconus. Various contact lens options, such as rigid gas permeable (RGP) lenses, soft and soft toric lenses, piggy back contact lenses (PBCL), hybrid lenses and scleral lenses are availble. This article discusses about selection of a lens depending on the type of keratoconus and the fitting philosophies of various contact lenses including the starting trial lens. A Medline search was carried out for articles in the English language with the keywords keratoconus and various contact lenses such as Rose k lens, RGP lens, hybrid lens, scleral lens and PBCL.

Show MeSH
Related in: MedlinePlus