Non-Contact Tonometry in Patients that Underwent Photorefractive Keratectomy
作者:
Giovanni Cennamo,
Nicola Rosa,
Agostino La Rana,
Stefania Bianco,
Adolfo Sebastiani,
期刊:
Ophthalmologica
(Karger Available online 1997)
卷期:
Volume 211,
issue 6
页码: 341-343
ISSN:0030-3755
年代: 1997
DOI:10.1159/000310825
出版商: S. Karger AG
关键词: Photorefractive keratectomy;Non-contact tonometry;Corneal thickness
数据来源: Karger
摘要:
To determine the accuracy of non-contact tonometry in patients with corneas thinned by photorefractive keratectomy, the authors measured the intraocular pressure with a non-contact tonometer and the corneal thickness with an ultrasonic pachymeter in 47 patients before and 9 months after photorefractive keratectomy. The patients were divided into three groups according to the degree of treatment: group I between 1 and 5 diopters (14 eyes), group II between 6 and 10 diopters (18 eyes), group III between 11 and 15 diopters (15 eyes). In the first group of patients mean intraocular pressure was 16.1 ( ± 3.85) mm Hg before surgery, and 13.2 ( ± 3.14) mm Hg after surgery with a significant difference (p = 0.0027). In the second group of patients mean intraocular pressure was 16.0 ( ± 4.13) mm Hg before surgery and 13.0 ( ± 3.0) mm Hg after surgery with a significant difference (p = 0.0045). In the third group of patients mean intraocular pressure was 17.7 ( ± 3.8) mm Hg before surgery and 12.4 ( ± 2.6) mm Hg after surgery, with a significant difference (p = 0.0005). In conclusion, according to our results, non-contact tonometry needs a correcting factor for measuring the intraocular pressure in patients that underwent photorefractive keratectomy, related to the degree of refractive trea
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