The definition of glaucoma is inseparable from observable optic nerve head (ONH) damage, but is usually associated with raised intraocular pressure (IOP) and visual field changes. Disc damage is clinically assessed under the headings of structural change (optic nerve and retinal nerve fibre layer)...
One of the main risk factors for glaucoma is elevated Intra-Ocular Pressure (IOP), but notice that IOP is not in the definition of glaucoma. In fact, about one-third of glaucoma patients have a normal IOP. This is one of the many reasons that glaucoma is also known as the “Silent Th...
Pathological myopia (also called malignant or degenerative myopia) is not as common as low or high myopia. It affects only about 3% of the world’s population. Even so, it is the seventh leading cause oflegal blindnessin America. In pathological myopia, progression and loss of vision can be...
取“22/7”作为π的近似值,则下列计算结果正确的是( )。
What is intelligence? So, AI tools are enabled by humans—but what is human intelligence? The term is defined asthe ability to learn, understand, and make judgements or have opinions that are based on reason. This encompasses a broad range of processes, instead of a single ability. This is...
Here’s the glaucoma definition you’re searching for (in everyday language). It’s an eye disease in which the damage to the optic nerve can lead to eyesight loss. Glaucoma is the second leading cause of blindness, and it primarily occurs in those over 60, but it may also strike at ...
List of words starting with this letter. Find the English dictionary definition of. Define and spell. Find the meaning of most old English words as of 1913. What is the definitions. Define terms. Learn the meaning of
What is primary iridocyclitis? DEFINITION. Primary iridocyclitis is also know as uveitis. Itrepresents an inflammation of the uveal tissues, primarily the iris and the ciliary body and is associated with the following conditions: Underlying systemic disease. Autoimmunity. ...
“Legally blind” means you’re essentially sightless in the eyes of the law ifeyeglassesorcontact lensescannot correct your vision beyond specific standards. How do we define who’s legally blind? In the U.S., the standard definition of legal blindness is based on central visual acuity (wha...
In practice, a key issue is the definition of occludable angle, which is considered as a diagnostic threshold. It was initially defined as ≥270° of the posterior (usually pigmented) trabecular meshwork not seen on gonioscopy, in keeping with several population studies (Arkell et al., 1987...