![]() In contrast, the Amsler chart is a simple, inexpensive, and available test that can easily detect different macular lesions and precisely enable the patient to analyze changes of Amsler grid abnormalities (size, shape, density, and location) thus, we can follow the progress of the macular disease over time as frequently as we need without side effects and without expenditure. OCT is an expensive investigation and not available all the time. Fluorescein angiography is not a procedure without side effects. Despite their high accuracy and their essential role in the diagnosis of macular lesions, FFA and OCT have limitations in their use. ![]() ![]() There are other sophisticated diagnostic investigations such as fundus fluorescein angiography (FFA) and optical coherence tomography (OCT). The Amsler chart can detect and localize these qualitative defects in different macular diseases exactly and precisely. At the same time, early detection of the onset or the progression of macular diseases is likely to become increasingly important as new modalities of treatment are introduced. The problem is how to find out these qualitative changes of vision and how to help patients explain, analyze, and document their observations. This functional disturbance usually precedes an evident organic lesion and is a sensitive guide to the course of any macular disease. Thus, 6/6 vision is not a proof of having no pathology. This is related to the fact that no more than 44% of the foveolar neuroretinal channels are required to have 6/6 vision. The patient may have 6/6 central vision, but the quality of vision might be missing. Qualitative disturbances of vision such as distortion and relative scotomas that accompany different macular diseases can escape ordinary quantitative methods of examining central visual acuity. Resurrection of the Amsler chart in macular diseases. How to cite this URL: Nassar MK, Badawi NM, Diab MM. How to cite this article: Nassar MK, Badawi NM, Diab MM. Keywords: Amsler chart, macula, metamorphopsia, scotoma The Amsler chart could be used for the follow-up of patients suffering from macular diseases with high reliability. The Amsler chart is an accurate test in detecting macular disease, and if used properly, it could be effective in the early detection of macular diseases. There was substantial agreement between the results of the Amsler grid and those of other investigations on the follow-up evaluation. The sensitivity of detection of macular disease by the Amsler grid was 88% (95% confidence interval: 77.9-97.6%). These patients were followed at 1, 3, and 6 months by BCVA, the Amsler chart, and other investigations.įifty patients (50 eyes) were analyzed statistically. Since its discovery, the Amsler grid has become important in the evaluation of the central 20° of the visual field surrounding the fixation.Ī total of 50 eyes of 50 patients with different types of macular diseases were tested by the Amsler chart and compared with other diagnostic investigations (fundus fluorescein angiography and optical coherence tomography) in each patient. The Amsler chart provides a convenient method to detect and monitor macular diseases on the basis of a grid pattern that allows both scotomas (detected by missing or blurred lines) and metamorphopsia (bowed or distorted lines) to be detected. Waggoner.To assess the validity of the Amsler chart as a screening test for the detection of macular diseases and to test its reliability in the follow-up of patients with macular diseases compared with other confirmatory investigative methods such as fundus fluorescein angiography (FFA) and optical coherence tomography (OCT). The Blind Spot Amsler™ is reproduced with the permission of the owner Dr. To get a complete understanding of the Amsler Grid, see our Report “The Amsler Grid” published in December 2019. The lines should appear to be straight and continuous from top to bottom and side to side. If your eye is functioning properly, you should be able to see the center white dot and the four corners and sides of the grid. During the entire test, you should have one eye covered, stare at the center of the grid and only see one red oval.ĥ. To view the chart at the proper distance, slowly move in toward your monitor until one of the two red ovals FIRST disappears.Ĥ. With the uncovered eye, stare at the white dot in the center of the grid.ģ. View the chart at arms distance and cover one eye. Wear the glasses you normally wear when reading.Ģ. Use it to monitor your vision between visits to an eye care professional.ġ. The Amsler Grid is a test for macular degeneration.
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