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Short-wavelength automated perimetry in type I diabetic patients without retinal involvement: a test modification to
Majid Abrishami1, Ramin Daneshvar, Zakiyeh Yaghubi
1Khatam Anbia Eye Hospital, Eye Research Center, Mashhad University of Medical Sciences (MUMS), Mashhad, Iran.
Purpose:
To compare short-wavelength automated perimetry (SWAP) between type I diabetic patients without clinical posterior segment involvement and nondiabetic control subjects.
Methods:
Forty eyes of diabetic patients without obvious posterior segment involvement and 34 eyes of the nondiabetic control group were included in the study. A complete set of ophthalmic examination was followed by SWAP perimetry in all subjects. Short-wavelength automated perimetry results were compared between the 2 groups. In addition, as a modification to SWAP, the data of the central 16 points were omitted and the resulting data of the remaining 60 points (corrected data) were compared between the 2 groups.
Results:
Mean deviation in the diabetic patients (group I) was -6.51 dB and in the control group (group II) -3.0 dB; the difference was statistically significant. Mean corrected sensitivity in group I was 19.79 dB and in group II 22.37 dB. Mean corrected total deviation in group I was -6.67 and in group II -3.22. Both differences were highly statistically significant. The mean corrected pattern deviation in group I was -3.29 and in group II -3.04, which was not a statistically significant difference.
Conclusions:
Short-wave automated perimetry abnormalities precede diabetic retinopathy in type I diabetic patients and omission of central 16 points does not compromise test results in this situation.
