[Accuracy of intraocular pressure measurement using NCT after LASIK].
OBJECTIVE
To study the accuracy of the intraocular pressure (IOP) after laser in situ keratomileusis (LASIK) with noncontact tonometer (NCT).


METHODS
One hundred and eighty cases (256 eyes) myopias that had undergone LASIK were studied. IOP, corneal thickness and corneal curvature were measured before and after LASIK. The correlations were analyzed.


RESULTS
The decrease of Iop using NCT was significantly obvious after LASIK (P < 0.001). One year after LASIK mean IOP drop was 6.54 +/- 2.1 mmHg. The reduction of IOP may be related to the decrease in corneal thickness and corneal curvature (P < 0.01). Regression equation for IOP drop (mmHg) = 0.355 + 0.0342X1 + 0.365X2 [X1 = decrease in corneal curvature (D), X2 = ablation depth (microm)]


CONCLUSIONS
The IOP readings after LASIK were lower than the real IOP values. IOP readings after LASIK were influenced by corneal thickness and refraction degree.
Chen
Yubing
Y
Department of Ophthalmology, The First People's Hospital of Foshan, Foshan 528000.
Zhao
Gangping
G
Pan
Meirong
M
Zheng
Qihua
Q
D000293:Adolescent; D000328:Adult; D000886:Anthropometry; D003315:Cornea / Q000473:pathology; D005260:Female; D006801:Humans; D007429:Intraocular Pressure; D020731:Keratomileusis, Laser In Situ; D008297:Male; D008365:Manometry / Q000379:methods; D008875:Middle Aged; D009216:Myopia / Q000601:surgery*; D011184:Postoperative Period