Kajian ini dilakukan untuk melihat sama ada presentasi ujian secara perlahan iaitu 1 Hz dikesan oleh sistem kromatik dan ketipan pada kadar yang tinggi, iaitu 25 Hz, 33 Hz dan 40 Hz dikesan oleh sistem ketipan yang tutin pada luminans latar belakang rendah dan tinggi. Flicker rates of 33 Hz and higher are detected by the pure flicker system.

In the case 25 Hz, it is not entirely detected by the 'pure flicker system' and the transient achromatic system might contribute in its detection. The study showed that the detection of a 1 Hz test is possible by 2 mechanisms, the chromatic system at high background luminance and the achromatic and chromatic systems at low background luminance. Spectral sensitivity measurements were carried out using a 1.2 degree test spot presented at a rate of 1 Hz, 25 Hz, 33 Hz and 40 Hz on a white background. This study was conducted to see if slow test presentations of 1 Hz was detected by the chromatic system and higher rates of flicker of 25 Hz, 33 Hz and 40 Hz were detected by the pure flicker system at lower and higher background luminances. Universiti Kebangsaan Malaysia 50300 Kuala Lumpur Malaysiaĭepartment of Optometry and Visual Sciences UMIST

Kromatik adalah