1 1-1 (Distance Visual Acuity Chart) 1-2 (Near Visual Acuity Chart) 1-3 (contrast sensitivity chart) 1-4 (Ishihara) D- 15 1-5
1-1 (Distance Visual Acuity Chart) 6m 6m 6m 1-1-1 1-1-1 1.0 (1 ) 1-1-2 1-1-2 2
Chapter 1 1. 3m 6m 1-1-3 1-1-3 Snellen s Bailey-Lovie Landolt C Feinbloom Chronister Pocket 3
1-1-4 Landolt Feinbloom 2. LED 1-1-5 1-1-5 4
Chapter 1 1-1-6 1-1-6 1. 6m 6m 5
2. 1-1-7 (1) (2) 1-1-7 0.1 Landolt (3) (4) (5) (6) (7) (8) (9) (program ) (program ) 6
Chapter 1 3. 55cm 45cm 4. (1) 1-1-8 E 0.50 (JCC) 7
1-1-8 (2) 1-1-9 Worth 8
Chapter 1 1-1-9 1-1-10 1-1-10 1. 2. 9
3. 5 30 4. 5. 6. 1-1-11 1-1-11 1024 768 5m E 1.0 10
Chapter 1 1600 1200 5m 1. 2. 3. 4. 0.5 5. 500~700 (Lux) 6. 1. 1-1-12 0.7 0.8 0.7 0.7 11
0.7-2 0.7 0.8 0.7 +2 1-1-12 2. 0.1 6m 1-1-13 3m 0.05 1m 0.02 1-1-13 12
Chapter 1 3. 0.02 cm 30cm/CF 1-1-14(a) 4. 5cm cm 20cm/HM 1-1-14(b) (a) (b) 1-1-14 (a) (b) 5. 5cm 5m 5m 50cm/LP 10cm NLP 6. 1m 9 + 13
1. 5 20ft 40ft 5 20/40 6m 24m 5 6/24 2. 20/40 0.5 2 1/2 0.5 3. (MAR) logmar 5 logmar 0.5 2 log2=0.3 5 0.3 4.7 4.7 0.2 5 log5=0.7 5 0.7 4.3 4.3 1-1-1 14
Chapter 1 1-1-1 Snellen (logmar) 20/10 2.0 5.3-0.3 20/12.5 1.6 5.2-0.2 20/16 1.25 5.1-0.1 20/20 1.0 5.0 0.0 20/25 0.8 4.9 0.1 20/32 0.63 4.8 0.2 20/40 0.5 4.7 0.3 20/50 0.4 4.6 0.4 20/63 0.32 4.5 0.5 20/80 0.25 4.4 0.6 20/100 0.2 4.3 0.7 20/125 0.16 4.2 0.8 20/160 0.125 4.1 0.9 20/200 0.1 4.0 1.0 20/250 0.08 3.9 1.1 20/233 0.06 3.8 1.2 20/400 0.05 3.7 1.3 20/500 0.04 3.6 1.4 20/667 0.03 3.5 1.5 1. 15
2. 200 120 cd/m 2 100 cd/m 2 300cd/m 2 1.4 200 cd/m 2 15% 3. 0.95 0.3~0.5 0.9 0.05 4. 6m 20ft 5m 16
Chapter 1 5. Snellen 1-1-2 1-1-2 (mm) (m) 87.27 6 0.1 10 72.73 5 43.64 3 5.82 0.4 8.73 6 1.0 1 7.27 5 4.36 3 0.58 0.4 E mm m (VA) 1-1-15 17
VA = 1 xmm ( ) m 1 12 tan 1000 ( ) x (mm) (m) 1-1-15 18
Chapter 1 1-2 (Near Visual Acuity Chart) 6m 40cm 30cm 25cm (optotypes) 6m 1.0 8.72mm 40cm 1.0 0.58mm(8.72 40/600) 1-2-1 1-2-1 19
1. E 40cm 30cm 25cm 1-2-2 1-2-2 2. N office 1/72in 0.353mm 16N~1.6N 20