Short wavelength automated perimetry can detect visual field changes in diabetic patients without retinopathy.
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Date
2014-04
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Abstract
Purpose: The purpose of the following study is to compare short wave automated perimetry
(SWAP) versus standard automated perimetry (SAP) for early detection of diabetic retinopathy
(DR). Materials and Methods: A total of 40 diabetic patients, divided into group I without DR
(20 patients = 40 eyes) and group II with mild non‑proliferative DR (20 patients = 40 eyes) were included.
They were tested with central 24‑2 threshold test with both shortwave and SAP to compare sensitivity
values and local visual field indices in both of them. A total of 20 healthy age and gender matched subjects
were assessed as a control group. Results: Control group showed no differences between SWAP and
SAP regarding mean deviation (MD), corrected pattern standard deviation (CPSD) or short fluctuations
(SF). In group I, MD showed significant more deflection in SWAP (−4.44 ± 2.02 dB) compared to SAP
(−0.96 ± 1.81 dB) (P = 0.000002). However, CPSD and SF were not different between SWAP and SAP.
In group II, MD and SF showed significantly different values in SWAP (−5.75 ± 3.11 dB and 2.0 ± 0.95)
compared to SAP (−3.91 ± 2.87 dB and 2.86 ± 1.23) (P = 0.01 and 0.006 respectively). There are no differences
regarding CPSD between SWAP and SAP. The SWAP technique was significantly more sensitive than SAP
in patients without retinopathy (p), but no difference exists between the two techniques in patients with
non‑proliferative DR. Conclusion: The SWAP technique has a higher yield and efficacy to pick up abnormal
findings in diabetic patients without overt retinopathy rather than patients with clinical retinopathy.
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Keywords
Mean deviation, non‑proliferative diabetic retinopathy, short fluctuations, short wave automated perimetry, standard automated perimetry
Citation
Ali Zico Othman, Abdel-Fattah El-Shazly Amany, Abdel-Hamid Ahmed Eslam Elsayed. Short wavelength automated perimetry can detect visual field changes in diabetic patients without retinopathy.Indian Journal of Ophthalmology. 2014 Apr ; 62 (4): 383-387.