1. The smaller extent of the nasal visual field can possibly be partly ascribed to peripheral ‘amblyopia ex anopsia’ (nose), SCHMIDT et al; 1971.
2. ZEHNDER-ALBRECHT, 1950; See also VERRIEST, 1969; GALAN, 1968.
3. ZEHNDER-ALBRECHT, 1950.
4. see also MAZZANTINI, 1963.
5. The data on the horizontal meridian have been compiled from FANKHAUSER & SCHMIDT’s results.