Comparison Subjective and Objective Chromoretinoscopy
DOI:
https://doi.org/10.47363/JORRR/2024(5)177Keywords:
Retinoscopy, Chromo Retinoscopy, Optometric Examination, Defogging Procedure, Regular WorkupAbstract
Subjective duochrome (chromoretinoscopy) is a method of analyzing the refraction of light in the eye using a small, hand-held device called a duochrome. The device consists of a light source and two filters; one red and other is green. The light is shone into the eye, and the filters are used to measure the amount of light that is absorbed or scattered by the eye. It relies on the observations and interpretation of the person performing the test. The results of the test can be influenced by factors such as the skill and experience of the person performing the test, as well as the patient's cooperation and willingness to follow instructions.
Objective duochrome (chromoretinoscopy) is a method of analyzing the refraction of light in the eye using an automated device. The device uses a light source and two filters, similar to the subjective duochrome, but it also includes a computerized system for measuring and analyzing the results. It relies on the automated measurement and analysis of the results, rather than on the observations and interpretation of the person performing the test. As a result, it is generally considered to be more accurate and reliable than subjective duochrome chromoretinoscopy.
To compare retinoscopy using colored filters (chromo-retinoscopy) with the conventional subjective duochrome method. All people between the ages of 16-35 years are included in this study whose responses are reliably taken in the subjective part of this study. Emmetropic, any kind of ametropic people have included in the study. The people were excluded with variable or unreliable responses, having any ocular pathology, and tired and irritated people. The difference between subjective and objective duochrome tests is 0.006 diopters. Statistically, this is not a significant difference. The objective duochrome technique (chromoretinoscopy) yields highly correlating values to subjective duochrome values. Thus, this technique can be relied on and can be added as a part of regular workup in clinics.