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Abstract #9812 Published in IGR 5-3
Is accurate assessment of the intraocular pressure after refraction operations possible?
Cernak A; Siskova E; Durcova T; Cernak MČeska a Slovenska Oftalmologie 2003; 59: 397-401
OBJECTIVE: To evaluate how the change of thickness or curving of the cornea after refraction operations (PRK or LASIK) influences the intraocular pressure (IOP) during assessment with a noncontact tonometer. PLACE OF INVESTIGATION: Ophthalmological Clinic SPAM and Ophthalmological ambulance EXCIMER. MATERIAL AND METHODS: With regard to the performed refraction operation, the patients were divided into two groups. The first group comprised 87 patients in whom PRK was performed to correct myopia. The mean myopia in this group was -5.27 D ± 2.32. The second group comprised 62 patients in whom LASIK surgery was performed to correct myopia. The mean myopia in this group of -10.18 ± 4.36. IOP was assessed by means of a noncontact tonometer before and six months after surgery. RESULTS: In the first group, a mean reduction in IOP by 4.8 ± 2.1 mmHg occurred. The central thickness of the cornea decreased on average by 55.69 ± 28.9 μm and the curve of the cornea decreased on average by 3.72 D ± 1.76 D. In the second group, IOP decreased on average by 7.97 ± 2.04 mmHg. The central thickness of the cornea decreased by 78.75 ± 42.26 μm and the curve of the cornea by 4.65D ± 2.07. In both groups a significant correlation was found between the reduction of IOP and the central thickness and curve of the cornea. CONCLUSIONS: Diminution of the thickness of the central cornea and diminution of the curving lead to lower values of the IOP. There is a direct correlation between thinning of the cornea and the decline of IOP. LA: Slovak
Dr. A. Cernak, Ocna Klinika SPAM, Antolska 11, 851 07 Bratislava, Slovakia
Classification:
8.4 Refractive surgical procedures (Part of: 8 Refractive errors in relation to glaucoma)