Correlation between myopia and major biometric parameters of the eye: a retrospective clinical study.
OBJECTIVE
To investigate the relationship between myopia and changes in ocular biometry and macular thickness in young adults.


METHODS
Two hundred sixteen eyes from 108 adults (23.3 +/- 6.3 years old, mean +/- SD) were measured for refractive status, corneal curvature, and axial components of the eye. Macular thickness was measured in 118 eyes (59 subjects) by optical coherence tomography. All eyes were categorized into emmetropia, low, moderate, or high myopia based on the refractive status. Biometric results from right eyes of all subjects were compared between sub-groups with the linear correlation analyzed between refraction and other parameters for each group.


RESULTS
The vitreous chamber depth was longest in high myopia, followed by the moderate myopia group, the low myopia group and finally the emmetropic group (p < or = 0.004). Average thickness of the inner and outer ring macula in all the myopia groups was significantly thinner than in the emmetropia group (p < or = 0.021). Among different macular regions, the inferior quadrant of the outer ring was consistently the thinnest in myopia. Corneal curvature, anterior chamber depth, and lens thickness measures were not associated with myopia.


CONCLUSIONS
Myopia in young adults is associated with an increase in vitreous length and a decrease in para-foveal thickness. The thinness in the retinal region inferior to the fovea appears to be more highly correlated with myopia than any other retinal region.
School of Optometry and Ophthalmology and Eye Hospital, Wenzhou Medical College, Wenzhou, Zhejiang, PR China
Ruozhong
R
Xie
Xiang-Tian
XT
Zhou
Fan
F
Lu
Min
M
Chen
Anquan
A
Xue
Shihao
S
Chen
Jia
J
Qu
D000328:Adult; D001699:Biometry / Q000379:methods; D003315:Cornea / Q000033:anatomy & histology / Q000473:pathology; D006801:Humans; D008266:Macula Lutea / Q000033:anatomy & histology* / Q000473:pathology; D009216:Myopia / Q000150:complications / Q000473:pathology / Q000503:physiopathology*; D012031:Refractometry; D012189:Retrospective Studies; D041623:Tomography, Optical Coherence / Q000379:methods; D014792:Visual Acuity; D014794:Visual Fields / Q000502:physiology; D014822:Vitreous Body / Q000033:anatomy & histology; D055815:Young Adult