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.
Spanish Grammar The Imperative - Commands Use of Imperative Overview The Imperative mode is used to give an order, to tell someone to do something or to advise someone. This mode can only be used with five gramatical persons: tÃº, usted, nosotros, vosotros, and ustedes. Let's look at a few examples: TÃº: Â¡Comete el pollo! Eat the chicken! Usted: Â¡Camine mÃ¡s despacio! Walk slower!