Journal of Ophthalmic and Optometric Sciences

Purpose: Blood Pressure (BP) is the pressure of circulating blood against the walls of blood vessels, and high blood pressure or hypertension is the condition in which the blood pressure is too high. Hypertension may affect different body organs. The visual system, mainly the visual pathway, may be affected by hypertension. The aim of the present study is to find out the possible effect of hypertension on the visual pathway using visual evoked potential.

Materials and Methods: Twenty-five patients (50 eyes) from 11 male and 14 female patients suffering from hypertension, were selected for the purpose of the present study. The patients were 47-67 years old. The patients had normal Best Corrected Visual Acuity (BCVA). Visual evoked potential (VEP) was tested including Latency (msec) and amplitude (µv) of VEP P100 peak were measured in the patients. The same procedure was done for 25 patients (50 eyes) from a control group with ordinary blood pressure, matched in terms of age, sex and BCVA. The results obtained in the two groups were compared to look for possible differences.

Results: There was a statistically significant difference between the case and control groups as far as latency of VEP P100 was concerned (P < 0.001), whereas no statistically significant difference was observed in amplitude between the case and control groups (P = 0.78).

Conclusion: Hypertension might affect the visual pathway of patients, which might be observed using VEP.

Purpose: The aim of present study was to measure visual evoked potential (VEP) among patients with glioma to study the possible change in VEP parameters including latency and amplitude, Peak in these patients.

Materials and Methods: Twenty-two eyes from 11 patients with optic nerve glioma (ONG) were selected for the purpose of present study. Flash type of VEP was recorded in these patients using a Mangoni machine. VEP, P100 latency (msec) and amplitude (µV) was measured. The results were compared with 11 sex and age matched patients.

Result: There was not a statistically significant difference in demographic findings between the case and control groups. Also, the difference between VEP, P100 parameters including latency and amplitude between the case and control groups were statistically significant.

Conclusion: From the results of the present study, we can conclude that visual pathway is affected among patients suffering from optic nerve glioma which can be measured using flash VEP recording.