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Vision and sports.

The relationship between optimal visual skills and optimal athletic performance is discussed along with specific examples of how performance can be affected in tennis, basketball, football, baseball, and golf. A step-by-step method is presented to evaluate these specific skills during the optometric evaluation.

Baseball↗

The effect of reduced viewing time on colour vision in normal subjects and those with abnormal ocular conditions.

The effect of restricting viewing time to 3.75 ms in normal subjects is to produce a tritan-like colour response on the City University colour vision test. This response pattern is consistent and is repeatable for standard illuminant C at 600 lx. Supplementary tests suggest that the effect is due to a defect of the blue/yellow opponent system rather than a true tritan defect. The same test when repeated on subjects with amblyopia or retinal pathology provides different results which may aid in the differential diagnosis of some visual disorders.

Amblyopia↗

Limitations of blue field entoptoscopy in evaluating macular function.

Evaluation of macular function in cataract patients using blue field entoptoscopy (BFE) has been reported as useful in all cases by some authors; another found it useful only in patients with moderate visual acuity loss due to cataract. This paper reports findings in 101 cataractous eyes evaluated consecutively with BFE. A strong correlation was found between cataract type and percentage of false negatives, but the correlation between the preoperative acuity level and percentage of false negatives was poor. BFE was also poor in detecting moderate macular dysfunction (20/60-20/80). Four cases with profound visual acuity loss due to macular holes had normal perception of BFE.

Cataract↗