[A comparative study of the reflective and apperceptive refractions (author's transl)]

Area of Science:

• Ophthalmology
• Optometry
• Vision Science

Background:

• Refractive error correction is crucial for visual acuity.
• Objective refraction methods aim to bypass conscious patient input.
• Subjective refraction relies on patient responses to achieve optimal correction.

Purpose of the Study:

• To compare the efficacy of manual and automatic refractometers against subjective refraction.
• To determine the visual acuity achieved with objective refraction values.
• To identify limitations of objective refraction in achieving optimal visual outcomes.

Main Methods:

• A comparative study involving 50 cases.
• Comparison of correction values from manual refractometer PR 50 and automatic refractometers (Dioptron, Auto-refractor 6600) with subjective refraction.
• Visual acuity was the primary criterion for comparison.

Main Results:

• Objective refraction achieved the same or better visual acuity than subjective refraction in 55% of cases.
• In 45% of cases, objective refraction resulted in lower visual acuity.
• Analysis identified specific refractive components (sphere, cylinder) contributing to reduced visual acuity in the latter group.

Conclusions:

• Objective refraction methods offer a viable alternative to subjective refraction, achieving comparable or superior visual acuity in a majority of cases.
• Further analysis is needed to refine objective refraction techniques and address discrepancies in cases with reduced visual acuity.
• Understanding the limitations of objective refraction is key to optimizing refractive correction strategies.