Purchase this article with an account.
K Ogata, M Hayashi, S Yamamoto; Effect Of A Refractor/camera Device On The Multifocal Electroretinograms . Invest. Ophthalmol. Vis. Sci. 2002;43(13):1180.
Download citation file:
© ARVO (1962-2015); The Authors (2016-present)
Purpose:To determine whether a refractor/camera device alters the multifocal electroretinograms (mfERGs). Methods:The refractor/camera (R/C) device consisted of a refractor which was used to correct the subject's refractive error without using loose lenses, and a camera which monitored the subject's eye movements on a PC screen. The R/C was placed in front of the TV monitor. mfERGs were recorded from 10 normal volunteers with the VERIS system using 61 stimulus elements. The maximum luminance (266 cd/m2) was used because the R/C reduced the stimulus luminance by about 25%. The mean amplitudes and implicit times of the first peak (P1) of ring 1 (center) to ring 5 (periphery) recorded with the R/C device were compared with those recorded without the R/C. Results:The mean amplitude of the mfERGs for ring 1 recorded with the R/C device was significantly larger (125%) than those without the R/C (P=0.01), however, no significant difference was observed from ring 2 to ring 5 for the two conditions. The mean implicit times with the R/C were shorter for all rings with than without the R/C device, but there was no significant difference between the rings. Conclusion:These results indicate that the refractor/camera enhanced the responses from the central area significantly. This was probably due to the spherical aberration induced by the lenses within the R/C device.
This PDF is available to Subscribers Only