Table 1
 Electrophysiological abnormality in each refractive group
Isolated rod
Isolated cone
Combined rodand cone
Inner retinal dysfunction
High myopia
1
1
6
4
Low myopia
0
1
5
3
Emmetropia
0
3
2
2
Low hyperopia
2
2
6
3
High hyperopia
0
1
3
1