Related Experiment Video
Updated: Oct 2, 2026
Assessing Early Stage Open-Angle Glaucoma in Patients by Isolated-Check Visual Evoked Potential
Published on: May 25, 2020
[Cup-to-disk ratio asymmetry: diagnostic value in glaucoma]
Purpose:
To assess visual field abnormalities in suspected glaucoma patients showing evident asymmetry in cup-to-disk ratio.
Material And Method:
Twenty two hypertensive eyes in 11 subjects evidencing lateral differences in cup-to-disk ratio of more than 2/10 were included in the study. Conventional and short wavelength automated perimetry (SWAP) was performed with a Humphrey field analyser. A retinal nerve fiber layer (RNFL) study was also performed.
Results:
Differences in IOP were 1.23 mmHg (p<0.05). No differences were evidenced in conventional automated perimetry between both eyes. Average sensitivity (SWAP) showed significantly lower (p<0.05) in those ayes with greater cup-to-disk ratio. RNFL showed a higher rate of defects in eyes with a higher cup-to-disk ratio.
Conclusion:
Lateral differences in cup-to-disk ratio indicate structural glaucomatous damage which is related to IOP levels. Associated functional loss was evidenced with SWAP (Arch Soc Esp Oftalmol 2002; 77: 17-22).
