A non-polarized alternative to polarized nearpoint test cards.
Refractive balance at near is feasible with an inexpensive, nonpolarizing device that yields data which compare favorably with polarizing methods. The device described here differs from the Turville system in that it provides a fused central field flanked by right and left peripheries that are seen monocularly. Among the advantages are simplicity, ease of alignment and low cost.
D006801:Humans; D012029:Refraction, Ocular; D014787:Vision Tests / Q000295:instrumentation* / Q000379:methods