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The role of the standard automated perimetry and Frequency doubling technology perimetry in diabetic retinopathy

Purpose: To determine if standard automated perimetry SAP and FDT perimetry can detect the effect of diabetes on retinal function in persons with diabetes in the early stage of disease and what methods is better. Researchers argued about fact that FDT can detect earlier visual disfunction than SAP. Methods: Visual function was assessed in 60 adults with normal retinal health, 60 adults with diabetes and no clinically detectable retinopathy and 60 adults with NPDR and normal visual acuity. FDT perimetry and SAP was taken . The presence and severity of diabetic retinopathy was determined by taking and evaluating two 50° fields color photography per eye: a macula- centred and a disc-centred. Results: Analising parameters among diabetics groups we found: sensitivity and specificity of SAP and FDT for medium sensitivity was 86, 7/33, 3(p< 0, 061) and 71, 7/41, 7(p< 0, 228) respectively, for medium deficit was 41, 7/76, 7(p< 0, 063) and 65/50(p< 0, 362) respectively, for LV/PSD was 51, 7/61, 7(p< 0, 536) and 61, 7/51, 7(p< 0, 666) respectively, and for foveal sensitivity 81, 7/36, 7(p< 0, 096) and 23, 3/86, 7(p< 0, 839) respectively. When we analising parameters betwen diabetics and control group we found sensitivity and specificity for medium sensitivity was 71, 7/61, 7 (p< 0, 001) and 70, 8/55(p< 0, 002) respec - tively, for medium deficit was 56, 7/60(p< 0, 058) and 77, 5/43, 3(p< 0, 037) respectively, for LV/PSD was 58, 3/58, 3(p< 0, 042) and 33, 3/83, 3(p< 0, 437) respectively, and for foveal sensitivity 82, 5/53, 3(p< 0, 001) and 28, 3/85(p< 0, 195) respectively. Conclusions: We can conclude that neither of methods can distinguished well diabetics without retinopathy from diabetics with retinopathy and but both methods can distiguished with resonable sensitivity and specificity diabetics from healthy subjects with parameter-mean sesitivity. Also we can not confer - med neither methods is superior one over the other as it is assumed by some researchers.

Perimetry; diabetes mellitus; retinal function

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