Eye drop
Eye drop
Eye drops (/aɪ drɒps/) are saline-containing drops used as an ocular route to administer. Depending on the condition being treated, they may contain steroids, antihistamines, sympathomimetics, beta receptor blockers, parasympathomimetics, parasympatholytics, prostaglandins, nonsteroidal anti-inflammatory drugs (NSAIDs), antibiotics, antifungal, or topical anesthetics. Eye drops sometimes do not have medications in them and are only lubricating and tear-replacing solutions.
Etymology
The term "eye drop" is derived from the English words "eye" and "drop". The word "eye" comes from the Old English "ēage" and the word "drop" comes from the Old English "dropa".
Usage
Eye drops are used to treat many conditions, consisting of glaucoma, allergies, and dry eyes. In addition, eye drops are considered local therapy. However, some eye drops can cause systemic side effects, particularly if not used properly.
Types
There are several types of eye drops, including over-the-counter drops for dry, red, or itchy eyes, drops for conjunctivitis, drops for contact lens re-wetting, drops for allergy relief, and drops for glaucoma.
Administration
Eye drops are typically administered in small amounts, with usually a fraction of a milliliter. The drop is instilled onto the conjunctiva sac, where it can be absorbed into the eye.
Related Terms
- Ophthalmology: The branch of medicine that deals with the diagnosis and treatment of eye disorders.
- Conjunctiva: The clear, thin membrane that covers part of the front surface of the eye and the inner surface of the eyelids.
- Glaucoma: A group of eye conditions that damage the optic nerve, the health of which is vital for good vision.
- Allergies: A condition in which the immune system reacts abnormally to a foreign substance.
- Dry Eyes: A condition caused by a lack of adequate tears.
External links
- Medical encyclopedia article on Eye drop
- Wikipedia's article - Eye drop
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