PROSPECTIVE EVALUATION OF VISUAL ACUITY AGREEMENT BETWEEN STANDARD EARLY TREATMENT DIABETIC RETINOPATHY STUDY CHART AND A HANDHELD EQUIVALENT IN EYES WITH RETINAL PATHOLOGY
| Autor: | Carl D. Regillo, Francis Char DeCroos, David S. Boyer, Ehsan Rahimy, Omesh P. Gupta, Julia A. Haller, Sahitya Reddy, M. Ali Khan |
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| Rok vydání: | 2015 |
| Předmět: |
Adult
Male medicine.medical_specialty Visual acuity genetic structures Correlation coefficient Intraclass correlation Visual Acuity Retina Young Adult Chart Retinal Diseases Ophthalmology medicine Humans Vision test Prospective Studies Aged Aged 80 and over Reproducibility business.industry Vision Tests Reproducibility of Results General Medicine Diabetic retinopathy Middle Aged medicine.disease Confidence interval Computers Handheld Optometry Female medicine.symptom Visual Fields business |
| Zdroj: | Retina (Philadelphia, Pa.). 35(8) |
| ISSN: | 1539-2864 |
| Popis: | Purpose To evaluate the visual acuity agreement between a standard back-illuminated Early Treatment Diabetic Retinopathy Study (ETDRS) chart and a handheld internally illuminated ETDRS chart. Methods Two-center prospective study. Seventy patients (134 eyes) with retinal pathology were enrolled between October 2012 and August 2013. Visual acuity was measured using both the ETDRS chart and the handheld device by masked independent examiners after best protocol refraction. Examination was performed in the same room under identical illumination and testing conditions. Results The mean number of letters seen was 63.0 (standard deviation: 19.8 letters) and 61.2 letters (standard deviation: 19.1 letters) for the ETDRS chart and handheld device, respectively. Mean difference per eye between the ETDRS and handheld device was 1.8 letters. A correlation coefficient (r) of 0.95 demonstrated a positive linear correlation between ETDRS chart and handheld device measured acuities. Intraclass correlation coefficient was performed to assess the reproducibility of the measurements made by different observers measuring the same quantity and was calculated to be 0.95 (95% confidence interval: 0.93-0.96). Agreement was independent of retinal disease. Conclusion The strong correlation between measured visual acuity using the ETDRS and handheld equivalent suggests that they may be used interchangeably, with accurate measurements. Potential benefits of this device include convenience and portability, as well as the ability to assess ETDRS visual acuity without a dedicated testing lane. |
| Databáze: | OpenAIRE |
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