INSUFFICIENCY OF ACCOMMODATION
The term insufficiency of accommodation is used when the accommodative power is significantly less than the normal physiological limits for the patient's age.
Therefore, it should not be confused with presbyopia in which the physiological insufficiency of accommodation is normal for the patient's age.
Causes
1. Premature sclerosis of lens.
2. Weakness of ciliary muscle due to systemic causes of muscle fatigue such as debilitating illness, anaemia, toxaemia, malnutrition, diabetes mellitus, pregnancy, stress and so on.
3. Weakness of ciliary muscle associated with primary open-angle glaucoma.
Clinical features
All the symptoms of presbyopia are present, but those of asthenopia are more prominent than those of blurring of vision.
Treatment
1. The treatment is essentially that of the systemic cause.
2. Near vision spectacles in the form of weakest convex lens which allows adequate vision should be given till the power of accommodation improves.
3. Accommodation exercises help in recovery, if the underlying debility has passed
OPTOMETRY-SHARP VISION
Optometrist