Table 1.

Technical specifications of different cameras.

Camera Brand	Topcon	Syseye	iCare	Canon
Type	TRC-NW400	RetiCam 3,100	iCare DRS	CR-2 AF
Mode	Automatic	Automatic	Automatic	Manual
Fixation	Center	Center	Macular	Center
Resolution	1,956 × 1.934	2,656 × 1,992	2,592 × 1,944	5,472 × 3,648
Minimum pupil size	3.3 mm	2.8 mm	3.8 mm	3.3 mm
Field of view	45°	50°	45°	45°