CYCLOPLEGIC Meaning and
Definition
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Cycloplegic is an adjective used to describe a class of drugs or agents that induce temporary paralysis of the ciliary muscles of the eye, resulting in the inability to focus on nearby objects. This medical term is derived from the words "cyclo-" which refers to the ciliary body of the eye, and "-plegic" denoting paralysis.
Cycloplegic drugs, such as atropine or tropicamide, are commonly used in ophthalmology to dilate the pupil and temporarily paralyze the ciliary muscles. By inhibiting the muscular contraction, these agents disrupt the normal accommodation process of the eye, preventing the adjustment of the lens for near vision. As a result, the individual experiences blurred vision when attempting to focus on close objects.
Cycloplegic agents are frequently utilized for diagnostic as well as therapeutic purposes. In diagnostics, they aid in the accurate measurement of the refractive error of the eye, particularly in children, by preventing accommodation and ensuring accurate prescription of corrective lenses. Therapeutically, cycloplegics can be employed to treat conditions such as accommodative esotropia or excessive eye convergence due to excessive focusing efforts.
It is important to note that the effects of cycloplegic drugs are temporary and their duration may vary depending on the specific agent used. Both the onset and duration of their action should be carefully considered when administering these drugs in a clinical setting.
Etymology of CYCLOPLEGIC
The word "cycloplegic" is derived from the combination of two Greek roots: "cyclo" and "plegic".
- "Cyclo" comes from the Greek word "kyklos", meaning "circle" or "circular". In the context of "cycloplegic", it refers to the ciliary body of the eye, which is a circular muscle responsible for controlling the shape of the lens.
- "Plegic" is derived from the Greek word "plegein", meaning "to strike" or "to paralyze". In medical terminology, "plegic" denotes paralysis or numbing of a particular area.
Thus, when combined, "cycloplegic" refers to a substance, medication, or procedure that temporarily paralyzes or relaxes the ciliary muscle, thereby preventing accommodation of the eye's lens.
