Light travels in straight lines. They don't bend around pin-holes, resulting in
fewer light rays traveling through the holes. A sharpened image is formed
on the retinal when one wears a pair of pin-hole glasses or Vision Therapy
Eyewear.

The Vision Therapy Eyewear can help myopic, astigmatic and presbyopic adults
and children see better without prescription glasses. The Eyewear works best as a
substitute to glasses with a diopter of less than 3.0 (or 300 degrees, minus or plus
diopter). For diopters between 3.0 to 5.0, using the Eyewear for reading or
computer use (not reading off fine prints far away) may be suitable for some
individuals. Beyond 5.0 diopter, the Eyewear is not likely to be useful. In this case,
stepped-down glasses are more suitable, especially when used in conjunction with
vision therapy.