How Hypotony cause choroidal detachment?
Serous choroidal detachment involves transudation of serum into the suprachoroidal space. This transudation may be due to increased transmural pressure, most frequently caused by globe hypotony, of any etiology or trauma, or exudation of serum, most frequently caused by inflammation.
How can you tell the difference between retinal and choroidal detachment?
An echographic (ultrasound) image of the eye shows a choroidal detachment. Your retina specialist can use these images to differentiate a choroidal detachment from a retinal detachment, characterize the size and type of the choroidal detachment (ie serous, hemorrhagic, or mixed), and monitor changes over time.
What is choroidal detachment?
Choroidal detachments occur when there is an accumulation of fluid or blood in the suprachoroidal space, a potential space situated between the choroid and the sclera. They are an uncommon ocular pathology.
What is flat anterior chamber?
FL: A flat anterior chamber in the presence of a diffuse filtering bleb suggests overfiltration of aqueous humor. The IOP, however, is likely to be low in such cases. A significant bleb leak is unlikely to be present if the bleb is well formed, but it might lead to a flat anterior chamber.
How do you drain a choroidal detachment?
Focal pressure applied to the anterior lip of the wound and/or ocular massage can help maximize drainage. As an alternative to a cut-down, one can insert a 23- or 25-gauge cannula. An angled-20° approach has been found beneficial to position in the suprachoroidal space.
What is the treatment for Hypotony?
Treatment options include argon laser photocoagulation, cryotherapy, external diathermy, ciliary body suturing, and vitrectomy with endotamponade. Clefts can spontaneously close and result in a dramatic rise in IOP.
What causes flat anterior chamber?
Causes and management of flat anterior chamber with elevated intraocular pressure. Angle-closure glaucoma is a frequent cause of narrowing of the anterior chamber. Acute angle closure presents with a painful red eye, significant intraocular pressure elevation, and closure of the angle detected by gonioscopy.
What is postoperative Hypotony?
Summary. Postoperative hypotony is a common complication of glaucoma filtering surgery, particularly with the adjunctive use of antifibrotic agents. Precautions may be taken intraoperatively and postoperatively to reduce the likelihood of hypotony.
What is the pathophysiology of a chiliochoridal detachment?
In a chiliochoridal detachment, fluid accumulates in the space between the choroid and sclera due to relative difference between the higher choroidal vascular pressure and the lower intraocular pressure.
What is the difference between retinal detachment and choroidal detachment?
Choroidal detachments can be distinguished from retinal detachments as their convex cross sectional appearance extends to the ciliary body, instead of stopping at the ora serrata like a retinal detachment. [7] The optic nerve head may become edematous due to constriction of axons.
What are the clinical features of hemorrhagic choroidal effusions?
Clinical Features. Unlike serous choroidal effusions, which typically develop painlessly, hemorrhagic choroidals generally have an abrupt onset with severe pain and marked reduction in visual acuity. When hemorrhagic choroidals are associated with high IOP, hyperosmotic agents and aqueous suppressants are recommended.
What is the role of ultrasound in the workup of choroidal effusions?
B-scan echography helps to differentiate choroidal effusions from retinal detachments. On echography, effusions are notable for their anterior angle and extension to the ora serrata. Ultrasonography offers a method for detecting a small accumulation of fluid in the supraciliary-choroidal space not readily apparent on clinical examination. 4