Journal of refractive surgery (Thorofare, N.J. : 1995) · 1998
Therapeutic alloplastic laser in situ keratomileusis for myopia.
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Maldonado-Bas A, Pulido-Garcia R
Аннотация
BACKGROUND: A new technique, therapeutic alloplastic laser in situ keratomileusis to correct high myopia, is introduced.
METHODS: Therapeutic alloplastic laser in situ keratomileusis consists of neutral homoplastic epikeratoplasty combined with superficial keratectomy performed with an excimer laser and/or a microkeratome. Indications for the technique are: myopia over 20 diopters (D), eyes with corneal scarring after photorefractive keratectomy (PRK), complications following keratomileusis, radial keratotomy complications with undercorrection, and keratoconus suspect myopic eyes.
RESULTS: In all five eyes we achieved precise corneal lathing with the microkeratome or the excimer laser, and obtained a clear allograft. In all eyes, we maintained or improved the patient's spectacle-corrected visual acuity related to baseline values. We did not induce astigmatism, and corneal thickness was almost unchanged.
CONCLUSIONS: Advantages of therapeutic alloplastic laser in situ keratomileusis are that it provides a Bowman's layer for the cornea following keratectomy, it is possible to lathe ablation diameters larger than 5 mm, it prevents the appearance of corneal haze, and reduces the need for corticosteroid treatment.
METHODS: Therapeutic alloplastic laser in situ keratomileusis consists of neutral homoplastic epikeratoplasty combined with superficial keratectomy performed with an excimer laser and/or a microkeratome. Indications for the technique are: myopia over 20 diopters (D), eyes with corneal scarring after photorefractive keratectomy (PRK), complications following keratomileusis, radial keratotomy complications with undercorrection, and keratoconus suspect myopic eyes.
RESULTS: In all five eyes we achieved precise corneal lathing with the microkeratome or the excimer laser, and obtained a clear allograft. In all eyes, we maintained or improved the patient's spectacle-corrected visual acuity related to baseline values. We did not induce astigmatism, and corneal thickness was almost unchanged.
CONCLUSIONS: Advantages of therapeutic alloplastic laser in situ keratomileusis are that it provides a Bowman's layer for the cornea following keratectomy, it is possible to lathe ablation diameters larger than 5 mm, it prevents the appearance of corneal haze, and reduces the need for corticosteroid treatment.