Cycloplegic

Cycloplegic is a type of eye drop used in the examination of the eye. It is used to temporarily paralyze the ciliary muscle of the eye to prevent the eye from focusing, a process known as cycloplegia. This allows the optometrist or ophthalmologist to accurately measure the refractive error of the eye and determine the need for corrective lenses.

Mechanism of Action

Cycloplegic eye drops work by blocking the action of acetylcholine, a neurotransmitter that causes the ciliary muscle to contract. This contraction is what allows the eye to change the shape of the lens and focus on objects at different distances. By blocking this action, the eye is temporarily unable to focus, allowing for accurate measurement of refractive error.

Uses

Cycloplegic eye drops are primarily used in the examination of the eye. They are particularly useful in determining the need for corrective lenses in children, as they can often accommodate, or adjust their focus, during an eye exam, leading to inaccurate results. Cycloplegic drops are also used in the treatment of certain eye conditions, such as iritis and uveitis, to reduce pain and inflammation.

Side Effects

Like all medications, cycloplegic eye drops can have side effects. These can include blurred vision, sensitivity to light, and difficulty focusing on close objects. These effects are temporary and should resolve once the medication wears off. In rare cases, cycloplegic drops can cause an increase in intraocular pressure, which can be dangerous for individuals with glaucoma.

Types of Cycloplegic Drops

There are several types of cycloplegic drops, including atropine, cyclopentolate, and tropicamide. The choice of drop depends on the individual patient and the specific needs of the examination.

See Also

• Eye examination
• Refractive error
• Corrective lenses

Cycloplegic Resources
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