The amblyopic eye has low amplitudes of accommodation proving the benefit of near adds in amblyopic patients. Prolonged near work might induce myopia in susceptible eyes by increasing the axial length.
Aim: To study the various ocular anatomical and physiological parameters in presbyopia.
Materials and methods:We studied the various ocular anatomical and physiological parameters like corneal curvature (keratometry readings: K1 and K2), central corneal thickness (CCT), anterior chamber depth (ACD), lens thickness (LT) and axial length (AL) in 100 presbyopic patients between 35 -55 years of age. The patients were divided into two age groups: I (35 -44 years) and II (45-55 yrs). ACD, AL and LT were measured using an Ascan. CCT was measured with ultrasonic pachymetry.
Results:The CCT decreased (BE), LT increased and ACD decreased (RE) significantly with increasing age (p < 0.05). There was no significant difference in males and females. Nearly 3/4 th of the total increase in lens thickness was responsible for the decrease in the anterior chamber depth and the rest, 1/4 th , goes posteriorly. Corneal curvature and AL showed no significant change with age.
Conclusions:The mean of CCT decreased significantly with advancing age. As age increased, the mean value of lens thickness increased and anterior chamber depth decreased. Nearly 3/ 4 th of total increase in LT was anteriorly, decreasing the ACD. Corneal curvature and AL has no relation with age.
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