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"The targets seem 1/3 smaller and 35% faster with one eye than with two eyes."re: Gil Ash, these statements are factually in error
Center Vision and Weak Eye Dominance
When you close an eye you do lose depth perception but more importantly your perceived lead will double or even triple.
A two eyed lead is as much as half or more LESS than a one eyed lead.
When we take shooters from one eyed to two once they understand the sight picture and can replicate it we tell them to cut their lead in half and they are instantly successful!!
The targets seem 1/3 smaller and 35% faster with one eye than with two eyes.
Dominance shifts are most often caused by shooters trying to be perfect in the set up by double checking the muzzle placement in the hold point.
Binocular summation refers to the improved visual performance of binocular vision compared to that of monocular vision.
Improvement has been well established in brightness perception, flicker perception, contrast sensitivity, peripheral visual field, response time, and visual acuity - by about 11%
Some people may perceive a difference in size and speed of a moving object two vs. one eye; but like visual acuity from binocular summation, the difference is no more than about 10%.
Source?