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Comparison of corneal thickness of young people with middle and high myopia between Shantou and Zhengzhou.

PURPOSE
To compare the corneal thickness of young subjects (aged 13 to 30 years) with moderate and high myopia living in Shantou and Zhengzhou.


METHODS
One hundred and forty myopic subjects from Shantou (Guangdong, southern China) and 101 from Zhengzhou (Henan, central China) were selected and divided into 2 groups (moderate-myopic group and high-myopic group). The participants were sex-and age-matched. The central corneal thickness (CCT) and thinnest corneal thickness (TCT) were measured by Orbscan and compared between the two groups.


RESULTS
In the high-myopic group, CCT (515.47±40.39 μm) and TCT (510.22±40.95 μm) of the Shantou subjects (mean spherical equivalent [SE] -7.56±1.35), were thinner than those of their Zhengzhou counterparts (mean SE -7.47±0.88). In the moderate-myopic group (Shantou mean SE -4.52±0.83; Zhengzhou -4.67± 0.77), CCT and TCT did not differ between the two cities.


CONCLUSION
The corneal thickness of high-myopic eyes may differ between Shantou and Zhengzhou.