A comparative study of chart 1 and chart 7 of amsler grid in early detection of symptomatic diabetic macular edema
Objective: The aim of this study is to compare the sensitivities of chart 1 and chart 7 of the Amsler grid in early detection of metamorphopsia suggestive of diabetic macular edema.
Design: It was a randomized, prospective, analytical study. Eighty patients were divided into two equal groups- A and B. Group A patients were given Amsler chart 1 and group B patients given Amsler chart 7.Regular 3 monthly follow up was done for 2 years with Optical Coherence Tomography (OCT) to detect DME on every follow up.
Setting: Retina Unit, M And J Western Regional Institute Of Ophthalmology, Civil Hospital, Asarwa, Ahmedabad, Gujarat, India.
Subjects: 80 eyes of 80 patients were enrolled, equally divided into 2 groups of 40 patients each.
Intervention: No intervention was done for purpose of study. DME was treated as per clinical guidelines.
Main outcome and Measures: Sensitivity and Specificity of both Amsler chart were calculated and compared using statistical analysis.
Results: The sensitivity of Chart 1 of Amsler grid in detecting metamorphopsia was 56.25 percent, whereas the sensitivity of Chart 7 of Amsler grid was 76.47 percent. The difference was statistically significant (P< 0>
Conclusion: Amsler grid type 7 is a superior tool in detecting metamorphopsia due to macular edema than type 1 conventional Amsler grid.
Keywords: Amsler grid, Diabetic macular edema
Design: It was a randomized, prospective, analytical study. Eighty patients were divided into two equal groups- A and B. Group A patients were given Amsler chart 1 and group B patients given Amsler chart 7.Regular 3 monthly follow up was done for 2 years with Optical Coherence Tomography (OCT) to detect DME on every follow up.
Setting: Retina Unit, M And J Western Regional Institute Of Ophthalmology, Civil Hospital, Asarwa, Ahmedabad, Gujarat, India.
Subjects: 80 eyes of 80 patients were enrolled, equally divided into 2 groups of 40 patients each.
Intervention: No intervention was done for purpose of study. DME was treated as per clinical guidelines.
Main outcome and Measures: Sensitivity and Specificity of both Amsler chart were calculated and compared using statistical analysis.
Results: The sensitivity of Chart 1 of Amsler grid in detecting metamorphopsia was 56.25 percent, whereas the sensitivity of Chart 7 of Amsler grid was 76.47 percent. The difference was statistically significant (P< 0>
Conclusion: Amsler grid type 7 is a superior tool in detecting metamorphopsia due to macular edema than type 1 conventional Amsler grid.
Keywords: Amsler grid, Diabetic macular edema