If right eye is defective: Two letters: DO
If left eye is defective: Two letters : OG
Ocular imbalance: DOG
Maddox Cheiroscope
This apparatus is used for training the ocular muscles and developing sight in squint and amblyopic eye.
Method:
The head is comfortably supported on the forehead rest, the whole
instrument being tilted to ensure correct head posture and the eyes
look into a pair of spherical lenses. The double-sided mirror may be
inclined to the left or to the right. The picture acrrier is designed
to fit on to either side of the instrument.
Figure 52: Maddox Cheiroscope
