![]() ![]() LCD panels typically switch between states and remain dark or bright for most of the frame. In the International Society for Clinical Electrophysiology of Vision (ISCEV) standard for clinical mfERGs (Hood et al., 2012), the potential problem with using a monitor other than a CRT is mentioned because the response time of the display screens must be very short. However, LCDs as visual stimulators have an inherent problem because it takes several milliseconds for the crystal molecules to change their alignment to permit the light to pass through the polarizing filter ( ) (den Boer, 2005 Elze, 2010). The white (luminance on) or black (luminance off) hexagon with a base period of 16.667 ms, the duration of one frame, was generated on cathode-ray tube (CRT) screens, but CRTs have recently been replaced by liquid crystal display (LCD) screens. The stimuli used to elicit mfERGs are comprised of 61 hexagons, and the sizes of the hexagons are scaled to elicit approximately the same amplitude mfERGs across the visual field. Multifocal electroretinograms (mfERGs) are the electrophysiologic responses elicited by stimulating focal areas of the retina (Hood, Odel, Chen, & Winn, 2003 Shimada, 2002 E. The OLED had good performance, and we conclude that it can replace the CRT as a stimulator for mfERGs however, a collection of normative data is recommended. The mfERGs elicited by monitors other than the CRT should be carefully interpreted, especially those elicited by LCD screens. The implicit times were approximately 10 ms longer in almost all components elicited by the LCD screen compared to those elicited by the CRT screen. The amplitudes of P1 and P2 of the first-order kernels of the mfERGs were not significantly different from those elicited by the CRT and OLED screens, and the P1 amplitude of the first-order kernel elicited by the LCD stimuli was significantly smaller than that elicited by the CRT in all the groups of the averaged hexagonal elements. The serial white stimuli of the OLED screen at 60 Hz did not fuse, and that of the LCD screens fused. A hexagonal stimulus array with 61 stimulus elements was created on each monitor. CRT, OLED, and LCD screens with a frame frequency of 60 Hz were studied. The luminance changes of each monitor were measured with a photodiode. The mfERGs elicited by a conventional CRT screen (S710, Compaq Computer Co.) were compared to those elicited by a studio-grade master OLED monitor (PVM-1741, Sony, Japan) and a conventional LCD (S1721, Flexscan, Eizo Nanao Corp., Japan). Abstract To compare a conventional cathode-ray tube (CRT) screen to organic light-emitting diode (OLED) and liquid crystal display (LCD) screens as visual stimulators to elicit multifocal electroretinograms (mfERGs), mfERGs were recorded from seven eyes of seven healthy volunteers (21 ± 2 years). ![]()
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