Eye Biometric Parameters In Patients With Hyperopia Depending On The Use Of Correction

To compare the anterior segment parameters of uncorrected and corrected hyperopic adults  by using optical biometry.

This retrospective study was conducted in Zaporizhzhia State Medical and Pharmaceutical University, Department of ophthalmology, medical center LCC “Visus”, Zaporizhzhia, Ukraine

This retrospective study included 101 hyperopic eyes of 51 patients between 40 and 70 years old (spherical equivalent (SE) under pharmacological cycloplegia was over 0.50 D). The eyes were divided into two groups according to using of correction as uncorrected (the 1^st group) and corrected (the 2^nd group) (49 eyes and 53 eyes, respectively). Anterior chamber depth (ACD), lens thickness (LT) Axial length (AL) were obtained by an optical biometry (IOL Master 700, Carl Zeiss). Measurements were compared between the groups, using Mann-Whitney test. The Spearman rank correlation coefficient (r) was used to statistically evaluate each parameter.

There were no statistically significant differences regarding the ages, genders and AL of the participants between the groups (p > 0.05). The medians of ACD were 2.79 [2.43; 2.95] mm and 3.14 [2.85; 3.31] mm, respectively, in uncorrected and corrected hyperopic eyes (p < 0.001), that's a difference of 11%. The medians of  LT were 4.77 [4.54; 4.97] mm and 4.25 [4.02; 4.46] mm, respectively, in the 1^st and 2^nd groups (p < 0.001); the difference between the groups is 12%.  There was no statistically significant correlation between the AL and ACD and AL and LT (p > 0.05). Age is significantly, negatively correlated with ACD (r −0.444), and positively with LT (r 0.659) (p < 0.001).

A statistically significant increase in LT of 12% and a decrease in the ACD by 11% compared to patients with corrected hyperopia was found in patients who did not use hyperopia correction. These indicators were independent of AL.

The negative age-ACD correlation and positive age-LT correlation suggests a shallower anterior chamber and thicker lens as patients age, increasing the risk of developing phacomorphic glaucoma. The use of constant correction of hyperopia can reduce this risk by preventing a marked change in the anterior segment parameters mentioned above.