Relationship between short wavelength perimetry and central corneal thickness values in ocular hypertensive subjects

PURPOSE. To evaluate the results of short wavelength perimetry (SWAP) of ocular hypertensive (OHT) patients and correlate these findings with central corneal thickness (CCT) measurements. METHODS. Thirty-seven OHT patients with a mean age of 50.2±8.2 (SD) years and 30 control subjects with a mean age of 50.3±8.5 (SD) years were included in this study. A questionnaire was applied to patients to evaluate the demographic risk factors that may predict glaucoma development. After a detailed ophthalmologic examination, achromatic and short wavelength perimetries and ultrasonic pachymetry were performed and the results were compared between the two groups with Student t test and Mann-Whitney U test. A p value <0.05 is considered as statistically significant. RESULTS. Mean CCT was higher in the OHT group (right eye; 558.13±28.39 μm and left eye; 558.94±27.30 μm) when compared with the control subjects (524.66±30.53 μm and 525.86±30.46 μm, respectively) (p<0.01). A significant positive correlation was found between CCT measurements and intraocular pressure (r=0.5, p<0.001). Four right eyes (10.8%) and five left eyes (13.5%) of OHT patients had defects in SWAP. OHT patients with SWAP abnormalities had significantly lower CCT measurements in right (527.25±17.34 μm) and left eye (528.80±13.60 μm) when compared with OHT patients without SWAP defects (561.87±27.29 μm and 563.65±25.92 μm, respectively) (p<0.05). Significant correlations were found between CCT and SWAP MD, PSD, and CPSD (p<0.05). CONCLUSIONS. OHT patients with SWAP abnormalities had significantly lower CCT measurements than those without. CCT is considered as a risk factor for the development of glaucomatous damage in OHT patients.