Archives of ophthalmology (Chicago, Ill. : 1960) · 1995
Experimental globe rupture after excimer laser photorefractive keratectomy.
СтатьяПоддержка исследования: вне правительства СШАНазвание и аннотация: Перевод в очереди
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Burnstein Y, Klapper D, Hersh P S
Аннотация
OBJECTIVE: To assess corneal weakening after photorefractive keratectomy.
METHODS: Photorefractive keratectomy was performed in 16 human eye-bank eyes by means of a 193-nm excimer laser (range, 6 to 54 diopters [D]). Porcine eyes underwent either photorefractive keratectomy procedures (range, 30 to 93 D) with a 5-mm beam diameter or deep 5-mm plano disc ablations. Intraocular pressure was increased gradually with the use of nitrogen gas until the globe ruptured.
RESULTS: Human eyes with less than 42 D of correction ruptured at the limbus or behind the insertions of the extraocular muscles. Two eyes showed initial leakage at the 42-D ablation site. Ablations greater than 46 D entered the anterior chamber during treatment. One porcine eye ruptured at the ablation site after a 42-D treatment. Other eyes ruptured at the equator with treatments up to 78 D.
CONCLUSION: Excimer laser photorefractive keratectomy does not weaken the cornea after degrees of ablation commonly used in the clinical setting.
METHODS: Photorefractive keratectomy was performed in 16 human eye-bank eyes by means of a 193-nm excimer laser (range, 6 to 54 diopters [D]). Porcine eyes underwent either photorefractive keratectomy procedures (range, 30 to 93 D) with a 5-mm beam diameter or deep 5-mm plano disc ablations. Intraocular pressure was increased gradually with the use of nitrogen gas until the globe ruptured.
RESULTS: Human eyes with less than 42 D of correction ruptured at the limbus or behind the insertions of the extraocular muscles. Two eyes showed initial leakage at the 42-D ablation site. Ablations greater than 46 D entered the anterior chamber during treatment. One porcine eye ruptured at the ablation site after a 42-D treatment. Other eyes ruptured at the equator with treatments up to 78 D.
CONCLUSION: Excimer laser photorefractive keratectomy does not weaken the cornea after degrees of ablation commonly used in the clinical setting.