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  2. Scleral lens - Wikipedia

    en.wikipedia.org/wiki/Scleral_lens

    A scleral lens is a prototypical lens dating back to the early 1880s. Originally these lenses were designed by using a substance to take a mold of the eye. Lenses would then be shaped to conform to the mould, initially using blown glass and then ground glass in the 1920s and polymethyl methacrylate in the 1940s. [ 6 ]

  3. Contact lens - Wikipedia

    en.wikipedia.org/wiki/Contact_lens

    Scleral lens, with visible outer edge resting on the sclera of a patient with severe dry eye syndrome. 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 ...

  4. Perry Rosenthal - Wikipedia

    en.wikipedia.org/wiki/Perry_Rosenthal

    Perry Rosenthal (September 2, 1933 - March 3, 2018) was a Canadian-born American eye surgeon and professor of ophthalmology, known for his work in the development of the first gas-permeable scleral contact lens.

  5. Pellucid marginal degeneration - Wikipedia

    en.wikipedia.org/wiki/Pellucid_marginal_degeneration

    Regardless of the lens size, it is thought that the larger the RGP lens will in most cases be more comfortable then standard rigid corneal lenses, and at times more comfortable than soft lenses, regardless of the fact that it is a rigid lens. The highlight to the scleral design and the correction of eye disorders such as pellucid marginal ...

  6. Glued intraocular lens - Wikipedia

    en.wikipedia.org/wiki/Glued_intraocular_lens

    Similarly the trailing haptic is then externalized using the "handshake technique". Scleral pockets are made at the edge of the flap with a 26-gauge needle just parallel to the sclerotomy site, into which the two haptics are then tucked for additional stability (Fig 4). The scleral flaps are then glued back into place using biological glue.

  7. 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

  8. Today's Wordle Hint, Answer for #1259 on Friday, November 29 ...

    www.aol.com/lifestyle/todays-wordle-hint-answer...

    If you’re stuck on today’s Wordle answer, we’re here to help—but beware of spoilers for Wordle 1259 ahead. Let's start with a few hints.

  9. Keratoconus - Wikipedia

    en.wikipedia.org/wiki/Keratoconus

    Scleral lens. Scleral lenses are sometimes prescribed for cases of advanced or very irregular keratoconus; these lenses cover a greater proportion of the surface of the eye and hence can offer improved stability. [55] Easier handling can find favor with people with reduced dexterity, such as the elderly.

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