Method and apparatus for measuring the visual acuity of the human eye during and immediately after ocular surgery

摘要

A method and apparatus are provided for measuring the visual acuity and refraction of the human eye during and immediately after ocular surgery. The method includes supporting a measuring means anterior to, and in line with the visual axis of, the eye and measuring the visual acuity of the eye using patient responses to visual prompts. The apparatus includes an elongate housing having an ocular aperture. A collimating lens is positioned within the housing adjacent to the ocular aperture and a resolution target is located above the collimating lens. A light source is used to illuminate the resolution target. The distance from the collimating lens to the target is adjustable, and refractive shift is indicated.