(vii) Power of lenses used for both eyes of the spectacles
of 10 children and 10 old persons-
Power of Lenses Used by
Children
Power of Lenses Used by
Old Persons
L/E
R/E
S. No.
L/E
R/E
S. No.
1.
2.
―2
1.complete the table
2.
3.
3.
4.
4.
5.
5.
6.
6.
7.
7.
8.
8.
9.
9.
10.
10.
Note: Students should collect the information about power
of both the eyes of spectacles of 10 children and
10 old persons and note them in a table.
​