the head of the patient should be held tight, not allowing its shaking; he should be asked to fix his gaze on (the tip of) his own nose. Then leaving half angula (1 cm) of space from the border of the black portion (cornea) and a quarter angula (0.5 cm) from the outer canthus,
the head of the patient should be held tight, not allowing its shaking; he should be asked to fix his gaze on (the tip of) his own nose. Then leaving half angula (1 cm) of space from the border of the black portion (cornea) and a quarter angula (0.5 cm) from the outer canthus,