Comparsion study Short-wave length automated perimetry and white-on-white perimetry in primary open angle glaucoma

Abstract

Objective To evaluate the application of short wave length perimetry (SWAP) in primary open angle glaucoma (POAG) and suspect to look for a superior method for the diagnosis of POAG. Methods Normal group and POAG group were applied HumphreyII 750i automated computer perimetry for Short-wave length automated perimetry (SWAP) examination and White-on-white perimetry (WWP) examination. The mean deviation (MD), pattern standard deviation (PSD) and defect points (the defect point, which was the point with P <0.05 in the pattern deviation statistical probability map was chosen) were compared and analyzed between the two groups. Results For early glaucoma and moderate glaucoma, MD detected by SWAP was larger than that detected by WWP, which had a significant difference. For advanced glaucoma, there was no difference between SWAP and WWP. It was the same as PSD. Defect points detected by SWAP were more than that detected by WWP, which had a significant difference. For advanced glaucoma, there was no difference between SWAP and WWP. In early PONG of 42 eyes, 38 eyes abnormal detected by SWAP, positive ratio was 90.48% (38/42); 28 eyes abnormal detected by WWP, positive ratio was 66.67% (28/42). In moderate glaucoma, the positive ratio was 100% (48/48); In advanced glaucoma, the positive ratio was 100% (18/18) detected by SWAP and WWP. Conclusions In moderate and advanced glaucoma, visual field defect detected by SWAP is larger and deeper than that detected by WWP. SWAP is more sensitive than WWP in the diagnosis of early POAG, positive ratio is higher. SWAP is not superior in advanced glaucoma. Key words: Short -Wavelength Automated Perimetry; White-on-White Perimetry; Glaucoma; Diagnosis