The relationship between intraocular pressure and refractive error adjusting for age and central corneal thickness.
OBJECTIVE
To investigate the relationship between intraocular pressure (IOP) and refractive errors after adjusting for age, central corneal thickness (CCT), and other related factors.


METHODS
IOP, CCT and refractive errors were measured in the right eyes of 1855 subjects, aged 40-82 years, in a cross-sectional study design. Subjects were divided into groups by refractive status: hyperopia, emmetropia, mild myopia, moderate myopia, or high myopia. With adjustments for age, CCT, blood pressure, obesity, education, hypertension, diabetes, and smoking status, IOP was estimated for each refractive status using a general linear model.


RESULTS
IOP increased with advancing degrees of myopia, even after adjustment for age, CCT, and other related factors (p = 0.011). Estimated IOP of moderate myopia was significantly higher than that of emmetropia (p = 0.022).


CONCLUSIONS
Our results confirm the positive association between IOP and increasing degrees of myopia. This finding would support the hypothesis that the relationship between glaucoma and myopia might be pressure mediated.
Nomura
Hideki
H
Department of Ophthalmology, Chubu National Hospital, 36-3 Gengo, Morioka-cho, Obu, Aichi 474-8511, Japan. nomura@nils.go.jp
Ando
Fujiko
F
Niino
Naoakira
N
Shimokata
Hiroshi
H
Miyake
Yozo
Y
D000328:Adult; D000367:Age Factors; D000368:Aged; D000369:Aged, 80 and over; D003315:Cornea / Q000473:pathology*; D003430:Cross-Sectional Studies; D048909:Diabetes Complications; D005260:Female; D006801:Humans; D006956:Hyperopia / Q000473:pathology / Q000503:physiopathology; D006973:Hypertension / Q000150:complications; D007429:Intraocular Pressure / Q000502:physiology*; D008297:Male; D008875:Middle Aged; D009216:Myopia / Q000473:pathology / Q000503:physiopathology; D012030:Refractive Errors / Q000150:complications / Q000473:pathology / Q000503:physiopathology*; D012907:Smoking / Q000503:physiopathology