A. Heijl

• Perimetry update 1990/1991
• 6th International Visual Field Symposium
• Fifth International Visual Field Symposium
• Perimetry Update 1988/1989
• Perimetry update 1996/1997
• Perimetry update, 1988-89
• Sixth International Visual Field Symposium
• Seventh International Visual Field Symposium, Amsterdam, September 1986