Subjective quasi-vector-based refraction with a conventional phoropter.

ABSTRACT:

Purpose

To introduce a novel methodology for subjective refraction based on power vectors with a conventional phoropter.

Methods

A conventional phoropter was used to measure power vector components of refraction (M, J₀ and J₄₅) directly by using the sphere power (for M measurement) and the cylinder power combined with the Jackson cross-cylinders (for J₀ and J₄₅ measurements). Conventional subjective refraction was also performed, and this result was mathematically transformed into power vector notation for comparison purposes. Visual acuities with the conventional prescription and the quasi-vector-based prescription were compared.

Results

Refractive error from 40 healthy participants was measured by conventional and quasi-ve

SUBMITTER: Albero Moreno JR 

PROVIDER: S-EPMC11629858 | biostudies-literature | 2025 Jan

REPOSITORIES: biostudies-literature