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.
It all depends on the strength of emotion you want to express. Exclamatory sentences can consist of a single verb or they can be more lengthy and complex. Examples of Imperative Sentences: 1  Halt! 2  Yield. 3  Watch for oncoming traffic. 4  Respond immediately. 5  Please lower your voice. 6  Meet me at the town square.