AIM: To study the correlation of operation age, axial length and lens thickness in cataract eyes.

METHODS: A total of 319 patients(393 eyes)were divided into non-high myopia cataract group(198 patients, 237 eyes)and high myopia cataract group(121 patients, 156 eyes)according to the axial length. Axial length and lens thickness were measured with A-mode ultrasound biometry.

RESULTS: There were statistical difference in operation age(t=3.614, P=0.000), lens thickness(t=-3.081, P=0.002)between the non-high myopia cataract group and high myopia cataract group. The operation age of high myopia cataract group was younger than that of non-high myopia cataract group. The lens thickness in high myopia cataract group was thicker than that in non-high myopia cataract group. There was no significant correlation between age and axial length in the non-high myopia cataract group(r=-0.081, P=0.214). Age and lens thickness had positive correlation in the non-high myopia cataract group(r=0.178, P=0.006). Axial length and lens thickness had no significant correlation in the non-high myopia cataract group(r=-0.050, P=0.442). There was a negative correlation between age and lens thickness in the high myopia cataract group(r=-0.211, P=0.008). Age and lens thickness had no significant correlation in the high myopia cataract group(r=0.078, P=0.332). Axial length and lens thickness had positive correlation in the high myopia cataract group(r=0.207, P=0.010).

CONCLUSION: For the non-high myopia cataract patients, the cataract aggravate as the age increase. The operation age will not change as the axial length change. For the high myopia cataract patients, the cataract will not aggravate as the age increase, and the longer of the axial length, the younger of the operation age.