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  2. Scleral lens - Wikipedia

    en.wikipedia.org/wiki/Scleral_lens

    A scleral lens, also known as a scleral contact lens, is a large contact lens that rests on the sclera and creates a tear-filled vault over the cornea.Scleral lenses are designed to treat a variety of eye conditions, many of which do not respond to other forms of treatment.

  3. Contact lens - Wikipedia

    en.wikipedia.org/wiki/Contact_lens

    A scleral lens is a large, firm, transparent, oxygen-permeable contact lens that rests on the sclera and creates a tear-filled vault over the cornea. The cause of this unique positioning is usually relevant to a specific patient whose cornea is too sensitive to support the lens directly.

  4. Exposure keratopathy - Wikipedia

    en.wikipedia.org/wiki/Exposure_keratopathy

    Lagophthalmos, the inability to close the eyelids completely is the main cause of exposure keratopathy.Common cause of lagophthalmos is facial nerve (CN VII) palsy. Facial nerve function may affect in several conditions like cerebrovascular accident, head trauma, brain tumors, Bell's palsy etc. Physiological inability to close the eyelids during sleep (nocturnal lagophthalmos) may also cause ...

  5. Perry Rosenthal - Wikipedia

    en.wikipedia.org/wiki/Perry_Rosenthal

    In 1986, he developed a practical, gas-permeable scleral contact lens to treat and restore vision of eyes with many corneal diseases, which ave been widely adopted in clinical practice, [7] [8] He has also published on oculofacial pain, [9] [10] and dry-eye disease.

  6. Optics and vision - Wikipedia

    en.wikipedia.org/wiki/Optics_and_vision

    A contact lens (also known simply as a contact) is a corrective, cosmetic, or therapeutic lens usually placed on the cornea of the eye. Modern soft contact lenses were invented by the Czech chemist Otto Wichterle and his assistant Drahoslav Lím , who also invented the first gel used for their production.

  7. List of optometric abbreviations - Wikipedia

    en.wikipedia.org/wiki/List_of_optometric...

    Contact lens associated/induced papillary conjunctivitis CLARE Contact lens associated red eye CLPU Contact lens associated peripheral ulcer CNS Central nervous system CNV Choroidal neovascularization: CRAO Central retinal artery occlusion CRVO Central retinal vein occlusion CSR Central serous retinopathy CVA Cerebrovascular accident Dx Diagnosis

  8. Keratoconus - Wikipedia

    en.wikipedia.org/wiki/Keratoconus

    Traditionally, contact lenses for keratoconus have been the 'hard' or RGP variety, although manufacturers have also produced specialized 'soft' or hydrophilic lenses and, most recently, silicone hydrogel lenses. A soft lens has a tendency to conform to the conical shape of the cornea, thus diminishing its effect.

  9. Effects of long-term contact lens wear on the cornea - Wikipedia

    en.wikipedia.org/wiki/Effects_of_long-term...

    Long-term contact lens use can lead to alterations in corneal thickness, stromal thickness, curvature, corneal sensitivity, cell density, and epithelial oxygen uptake. . Other structural changes may include the formation of epithelial vacuoles and microcysts (containing cellular debris), corneal neovascularization, as well as the emergence of polymegethism in the corneal endoth