What is OCTA used for?
OCTA gives us the opportunity to study the choroidal, retinal, and optic nerve vasculature without the need of dye injection and its possible risks. OCTA has been used to investigate diabetic retinopathy, retinal vein occlusion, retinal artery occlusion, glaucoma, and anterior ischemic optic neuropathy.
How does Rubeosis Iridis cause glaucoma?
Rubeosis iridis is defined as neovascularization of the iris characterized by numerous coarse and irregular vessels on the surface and stroma of the iris. These new blood vessels may cover the trabecular meshwork, cause peripheral anterior synechia and give rise to secondary glaucoma.
Why does neovascularization occur?
Corneal neovascularization is a condition where new blood vessels invade into the cornea from the limbus. It is triggered when the balance between angiogenic and antiangiogenic factors are disrupted that otherwise maintain corneal transparency.
What is 100day glaucoma?
Patients with central retinal vein occlusion are at risk for what is termed the 100-day glaucoma. Eighty percent of patients with central retinal vein occlusion with NVG developed the disease in the first 4 months after the initial occlusion.
How does optical coherence tomography angiography work?
Optical coherence tomography angiography (OCTA) is a new non-invasive imaging technique that employs motion contrast imaging to high-resolution volumetric blood flow information generating angiographic images in a matter of seconds.
What is the difference between Oct and octa?
The important difference between OCT and OCTA is: OCT images anatomical structure, OCTA images vascular structure. A large amount of burden is placed on the imager-usually technicians-because the amount of data captured in a scan is more than the clinician, or interpreter of the images, can feasibly decipher.
How do you treat Rubeosis?
Once rubeosis iridis has begun, the primary goal of treatment is to reduce the ischemic drive of neovascularization. This is best accomplished with panretinal photocoagulation (PRP) to destroy ischemic retina, minimize the eye’s oxygen demand, and reduce the amount of VEGF being released.
What does Iridis mean?
Reviewed on 6/3/2021. Heterochromia iridis: A difference in color between the iris of one eye and the iris of the other eye. A person with one brown eye and one blue eye has heterochromia iridis. CONTINUE SCROLLING OR CLICK HERE.
Does neovascularization cause blindness?
Neovascularization within the eye contributes to visual loss in several ocular diseases, the most common of which are proliferative diabetic retinopathy, neovascular age-related macular degeneration, and retinopathy of prematurity.
What is CRVO?
Arteries and veins carry blood throughout your body, including your eyes. The eye’s retina has one main artery and one main vein. When the main retinal vein becomes blocked, it is called central retinal vein occlusion (CRVO). When the vein is blocked, blood and fluid spills out into the retina.
What is a nuclear cataract?
Nuclear cataracts is the most common form of cataracts. The most common cause of a nuclear cataract is aging, which unfortunately is unavoidable. A nuclear cataract begins as the hardening and yellowing of the central zone of the lens which, over time, expands outward to the other layers of the eyes.
What is the history of congenital nuclear cataracts?
Congenital nuclear cataracts are the only ocular abnormalities in these conditions. There may be some cortical opacifications as well. The nuclear opacifications may not be sufficiently dense in some patients to require cataract surgery. Nothing is known of their natural history, however.
Can nuclear cataracts co-exist with glaucoma?
Then again, nuclear cataracts may co-exist with glaucoma. This disease destroys the optic nerve in the eyes. Therefore, vision is impaired. It is true that older people are more prone to the appearance of cataracts. However, it need not always be so.
What is the history of nuclear opacifications of the eye?
The nuclear opacifications may not be sufficiently dense in some patients to require cataract surgery. Nothing is known of their natural history, however. No systemic disease is associated with these congenital cataracts.