When you click on links to various merchants on this site and make a purchase, this can result in this site earning a commission. Affiliate programs and affiliations include, but are not limited to, the eBay Partner Network.
Ophthalmic Recessive Strabismus Testing Tools Prism Diopters Hetemphoria Risley:
$112.00
It have two option:20 degree
Check Range: 0△ ~20 △(three prism degree) each sub-stroke value is 1△
