Functional Visual Acuity of Early PresbyopiaReport as inadecuate




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Purpose

To evaluate visual function in patients with early presbyopia using the functional visual acuity FVA test.

Methods

This study included 27 eyes of 27 healthy older volunteers mean age, 44.1 ± 2.6 years and 14 eyes of 14 healthy young volunteers mean age, 28.4±4.8 years. The distance-corrected visual acuity DCVA, distance-corrected near VA DCNVA, subjective amplitude of accommodation AA, and distance and near pupillary diameters were measured. The distance FVA and distance-corrected near FVA DCNFVA were measured using the FVA Measurement System. The standard Schirmer test and standard tear break-up time measurement also were performed.

Results

The logarithm of the minimum angle of resolution logMAR DCVA was better than 0 in all subjects. The percentages of subjects with logMAR DCNVA below 0 was significantly lower in the presbyopia group than in the young group. The DCNFVA in the presbyopia group was significantly P < 0.001 poorer than the DCNVA in that group. Significant linear negative correlations were seen between the DCNVA and AA r = -0.507, P < 0.001 and the DCNFVA and AA r = -0.681, P < 0.001 in the older subjects. Stepwise regression analysis showed that only the AA was a significant factor predictive of the DCNFVA in the presbyopia group. Tear function parameters were not adopted in the regression model.

Conclusions

Measurement of the DCNFVA can detect decreased AA in early presbyopia better than measurement of the conventional near VA. The DCNFVA is a good index for early presbyopia.



Author: Yusaku Katada , Kazuno Negishi , Kazuhiro Watanabe , Yuta Shigeno , Megumi Saiki , Hidemasa Torii , Minako Kaido , Kazuo Tsubota

Source: http://plos.srce.hr/



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