title: Holographic multivergence target for subjective measurement of the spherical power error of the human eye.
abstract: We have fabricated a single hologram with which to determine the spherical refractive error of the human eye in the range 5 to -2.5 diopters (D) with an accuracy of +/-0.25 D in a single step. The amplitude of accommodation is determined at the same time. The hologram is a record of 16 targets, each of which has a different image vergence in the range 5 to -2.5 D in steps of 0.5 D. This idea can be applied readily to any dioptric range. The measurement method is simple, fast, and reliable.
authors.affiliation: Centre for Eye Research, School of Optometry, Queensland University of Technology, Kelvin Grove, Queensland 4059, Australia. k.avudainayagam@qut.edu.au
authors.forename: Kodikullam V
authors.initials: KV
authors.lastname: Avudainayagam
authors.forename: Chitralekha S
authors.initials: CS
authors.lastname: Avudainayagam
mesh_terms: D003198:Computer Simulation; D004867:Equipment Design; D006696:Holography / Q000295:instrumentation / Q000379:methods* / Q000592:standards; D006801:Humans; D008962:Models, Theoretical; D012030:Refractive Errors / Q000175:diagnosis*