Synechia (eye)
Ocular synechia is an eye condition where the iris adheres to either the cornea (anterior synechia) or lens (posterior synechia).
-
Synechiae can be caused by ocular trauma, iritis, or iridocyclitis.
source quote
Synechiae can be caused by ocular trauma , iritis or iridocyclitis
-
Synechiae may lead to certain types of glaucoma.
source quote
and may lead to certain types of glaucoma
-
Anterior synechia causes closed angle glaucoma by closing the drainage way of aqueous humour, raising intraocular pressure.
source quote
Anterior synechia causes closed angle glaucoma , which means that the iris closes the drainage way of aqueous humour which in turn raises the intraocular pressure
-
Posterior synechia causes glaucoma by blocking the flow of aqueous humor from the posterior chamber to the anterior chamber.
source quote
the iris adheres to the lens, blocking the flow of aqueous humor from the posterior chamber to the anterior chamber
-
The pupil may appear misshapen due to synechia.
source quote
Misshapen pupil due to Iritis -caused synechia in the left eye
-
Dilation of the pupil can cause an irregular, non-circular shape called dyscoria.
source quote
Dilation of the pupil in an eye with synechia can cause the pupil to take an irregular, non-circular shape (dyscoria)
-
Synechia is sometimes visible on careful examination.
source quote
It is sometimes visible on careful examination
-
Synechia is usually more easily observed through an ophthalmoscope or slit-lamp.
source quote
but usually more easily through an ophthalmoscope or slit-lamp
-
Mydriatic or cycloplegic agents such as topical homatropine are useful in breaking and preventing posterior synechia.
source quote
Mydriatic or cycloplegic agents, such as topical homatropine , which is similar in action to atropine , are useful in breaking and preventing the formation of posterior synechia
-
These agents work by keeping the iris dilated and away from the crystalline lens.
source quote
by keeping the iris dilated and away from the crystalline lens
-
Topical corticosteroids can be used to subdue inflammation.
source quote
To subdue inflammation, topical corticosteroids can be used.
-
A prostaglandin analogue such as travoprost may be used if intra-ocular pressure is elevated.
source quote
A prostaglandin analogue , such as travoprost , may be used if the intra-ocular pressure is elevated.
-
Synechiae may lead to certain types of glaucoma.
source quote
and may lead to certain types of glaucoma
-
Posterior synechia can be observed in cases of anterior uveitis secondary to severe to moderate bacterial keratitis.
source quote
Posterior synechia can be observed in cases of anterior uveitis secondary to severe to moderate bacterial keratitis.
If the pupil can be fully dilated during treatment of iritis, the prognosis for recovery from synechia is good; it is a treatable condition.
| Synechia | |
|---|---|
| Posterior synechia showing part of iris adherent to the lens | |
| Specialty | Ophthalmology |
Ocular synechia is an eye condition where the iris adheres to either the cornea (i.e. anterior synechia) or lens (i.e. posterior synechia).[1][2] Synechiae can be caused by ocular trauma, iritis or iridocyclitis and may lead to certain types of glaucoma. It is sometimes visible on careful examination but usually more easily through an ophthalmoscope or slit-lamp.
Anterior synechia causes closed angle glaucoma, which means that the iris closes the drainage way of aqueous humour which in turn raises the intraocular pressure. Posterior synechia can be observed in cases of anterior uveitis secondary to severe to moderate bacterial keratitis.[2] Posterior synechia also cause glaucoma, but with a different mechanism. In posterior synechia, the iris adheres to the lens, blocking the flow of aqueous humor from the posterior chamber to the anterior chamber. This blocked drainage raises the intraocular pressure.
Mydriatic or cycloplegic agents, such as topical homatropine, which is similar in action to atropine, are useful in breaking and preventing the formation of posterior synechia by keeping the iris dilated and away from the crystalline lens. Dilation of the pupil in an eye with synechia can cause the pupil to take an irregular, non-circular shape (dyscoria) as shown in the photograph. If the pupil can be fully dilated during the treatment of iritis, the prognosis for recovery from synechia is good. This is a treatable status.
To subdue inflammation, topical corticosteroids can be used. A prostaglandin analogue, such as travoprost, may be used if the intra-ocular pressure is elevated.
- ↑ "Synechiae". EyeWiki. Retrieved 2023-10-01.
- 1 2 F. Salmon, J. (2019) Kanski's Clinical Ophthalmology. 9th Edition, Elsevier. ISBN 978-0-7020-7711-1