Staphylomas is a localized bulging of weak and thin outer tunic of eyeball, lined by uveal tissue. Types- 1. Anterior staphyloma. 2. Intercalary staphyloma.
When eyes are covered insufficiently by the lids and there is loss of protective mechanism of blinking, then it is called exposure keratitis. Causes- 1. Extreme proptosis.
Bacterial corneal ulcer is caused when the local ocular defense mechanisms are not working properly and the immunity of the body is very low due to which infecting organisms enters the body easily and infected it with different causative micro-organisms and spread diseases. Causes -
When the accommodative power of eye is significantly reduced than the normal biological limit according to patient’s age, then this is called insufficiency of accommodation. Causes- 1. Premature sclerosis of lens.