ⓘ Couching (ophthalmology)

                                     

ⓘ Couching (ophthalmology)

Couching is the earliest documented form of cataract surgery. As a cataract is a clouding in the lens of the eye, couching is a technique whereby the lens is dislodged, thus removing the opacity. Although couching is nowadays routinely practiced only in remote areas in third world countries, it was a precursor to modern cataract surgery and pars plana vitrectomy.