Open versus closed view autorefraction in young adults

Abstract Purpose While there are numerous studies comparing open-view autorefractors to subjective refraction or other autorefractors, most between closed and autorefraction tend focus on children rather than young adults. The aim of this study was determine the concordance in non-cycloplegic refractive error two modern objective autorefractors: closed-view monocular Topcon TRK-2P binocular Grand Seiko WR-5500. Methods Fifty adults aged 20–29 years (mean age 22?±?1.6 years) underwent using WAM-5500 (open view) (closed-view) both eyes. Findings were expressed as isolated spherical component also converted from clinical vector notation: Mean Spherical Error (MSE) astigmatic components J0 J45. Results MSE?±?SD ?1.00?±?2.40D for compared ?1.23?±?2.29D TRK-2P. Up seventy-six percent cohort had mean errors which fell within ±0.50D reading 58% ±0.25D. differences instruments statistically significant all (J0, spherical, MSE) (p? ?0.05). Conclusions MSE these small, but significant. From a perspective may serve useful starting point refraction, additional work is needed help further minimise instruments.