مرکز منطقه ای اطلاع رساني علوم و فناوري - Lens thickness, anterior chamber depth and axial lenght changes in patients with age-related cataract

Abstract :

Purpose: To assess lens thickness, anterior chamber depth and axial length in patients with age-related cataract using ultrasound biometry and compare with the normal eyes. Materials And Methods: Patients with age-related cataract were included in this retrospective study. A group of elderly subjects with a clear lens and normal visual acuity served as the control group. Lens thickness, anterior chamber depth and axial length were evaluated by using ultrasound biometry. Results: Seventy nine patients with age-related cataract (116 eyes) were evaluated. The control group comprised 40 eyes (20 subjects) with a clear lens and normal visual acuity. There were significant differences in lens thickness and anterior chamber depth between age- related cataract and clear lenses. Lens thickness was significantly greater in clear lenses when compared with age-related cataract (p 0.01). There were statistically significant differences in lens thickness according to different types of cataract (p 0.05). Lens thickness was significantly less in posterior subcapsular cataract than nuclear and karma types of cataract (p=0.021; p=0.016). The anterior chamber depth decreased more in eyes with cortical cataract although there were not statistically significant differences in axial length and anterior chamber depth according to different types of cataract. The anterior chamber depth was inversely correlated with lens thickness (r=-0.05; p=0.001). Conclusions: Lens thickness was significantly greater in clear lenses when compared with age-related cataract. Lens thickness was significantly less in posterior subcapsular cataract than nuclear and karma types of cataract. A significant decrease in anterior chamber depth was found with the increase in lens thickness.