Ability of Short wavelength automated perimetry to detect visual field changes in diabetic patients

Abstract

Background: Globally, diabetes-related eye illness is the primary cause of visual impairment due to cataracts or retinopathy. The two most used visual field testing modalities in clinical practice are standard automated white-on-white (W-W) perimetry (SAP) and short wave length automated perimetry (SWAP). Objectives: To compare the value of short wave length automated perimetry SWAP (blue on yellow in contrast) to standard automated perimetry SAP in detecting changes in retinal sensitivity in diabetic individuals with or without retinopathy. Patients and methods: Forty eyes of forty patients divided into two groups, group (A) diabetic patients (20 eyes) without diabetic retinopathy and group (B) diabetic patients (20 eyes) with early diabetic retinopathy. The perimetry was done for all patients into two perimetry examination. First visit was for SAP and second visit was for SWAP. Results: In SAP, group II's MD (mean deviation) was considerably lower than group I's (P = 0.003). In SWAP, the MD in group II was considerably lower than in group I (P = 0.001). MD was substantially lower in SWAP than SAP in group I (P = 0.00009). In group II, the same results were obtained. Conclusions: In terms of distinction, the SWAP approach proved more sensitive and informative than the SAP technique.

Keywords

• swap; sap; vf; dm