COMMUNICATIONS RETINAL CYSTS ANDRETINOSCHISIS* BY C. G. KEITH DepartmentofPathology, Institute ofOphthalmology, University ofLondon SINCE the term retinoschisis came into commonophthalmological parlance, it has oftenbeenusedas thoughthe conditionwereadefinite entity, differing fromretinal cysts bythe process byWhichit arose.
The definition of imperative is something that has authority or is absolutely necessary. 1  An example of imperative is the power that a government has over its people.  An example of imperative is the decision to give a cesarean in a breach birth.
We are telling some what to do. Sentence two uses an imperative to tell someone what to do. Note: we can make 'Close the door' into a request by adding 'Please' first: 'Please, close the door.'. An imperative is base verb (present simple verb).Above, 'close' is the verb.e are telling some what to do. Sentence two uses an imperative to tell someone what to do. Note: we can make 'Close the door' into a request by adding 'Please' first: 'Please, close the door.'. An imperative is base verb (present simple verb).