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.
This is the technological imperative at work in both of these two examples. A piece of technology exists; we need it. Notice that I didnât write that we want it, we would like it, or we might be able to use it. I wrote that we N-E-E-D it. That is why it is called the Technology Imperative. Some definitions of âimperativeâ include: Not to be avoided or evaded; obligatory; binding; compulsory; as, an imperative duty or order.