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10 - 14 Sept. 2016, Bella Center, Copenhagen, Denmark

This Meeting has been awarded 27 CME credits

 

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Prescription of refractive auxiliary correction for night vision improvement using different methods: pilot study

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Session Details

Session Title: Presented Poster Session: Training and Innovation in Education/Quality of Vision Evaluation

Session Date/Time: Monday 12/09/2016 | 09:30-11:00

Paper Time: 10:00

Venue: Poster Village: Pod 3

First Author: : S.Peixoto-de-Matos PORTUGAL

Co Author(s): :    N. Lopez-Gil   J. Gonzalez-Meijome           

Abstract Details

Purpose:

To use different methods to determine an addition dioptric value to be prescribed over the best subjective spherocylindrical refraction, and evaluate the satisfaction of healthy patients to drive at night, see stars in the sky and watch TV in a dark room

Setting:

CEORLab - Center of Physics, University of Minho, Braga, Portugal

Methods:

Eleven young healthy subjects participated in this study where an addition lens was determined using subjective adjustments using letters as targets, difference in subjective refraction to see letters and LED light and using an aberrometer to determine the change in equivalent defocus for a pupil of 3 and 6 mm. Each subject worn each pair of glasses for 7 days and rated the satisfaction while driving at night, seeing stars and watching TV in a dark room. One pair of glasses with the patient’s subjective refraction acted as control placebo.

Results:

Aberrometer method rendered the lower values of negative add (-0.34±-0.04 D) compared to the remaining methods (Kruskall-Walllis, p<0.05). Subjective satisfaction improved by 1.5 values in a range from 0 to 5. This improvement was higher for tasks related with outdoor activities (night driving and seeing stars in the sky) compared to indoor activity (watching TV in a dark room). Monocular or binocular subjective adjustments using letters as targets did not change or reduced the satisfaction of the subject for the tested conditions.

Conclusions:

The present results have immediate clinical implications to determine a better correction for nigh vision tasks. The prescription that better suited the preference of the patient was obtained by adding the difference in equivalent defocus for a pupil of 3 and 6 mm from the aberrometer, to the best distance correction. This results might help us in the management of dysphotoptic complains experience by some patients after refractive surgical procedures.

Financial Disclosure:

NONE

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