Hyperopia Definition Hyperopia is a vision problem of having difficulty seeing objects that are near and rather see things clearly at a distance. It is also known as farsightedness or long sightedness. It is a result of imperfection in the eye having too short for an eyeball and the lens is not round enough. Focus of hyperopia is behind the retina when the light enters the eye instead of directly to it. Hyperopia is often associated with blurred vision for older people aged 40 years and above due to the inability of the lens to accommodate light as a result of aging process. In younger people and with mild hyperopia, [...]
Eye Care
Visual Acuity
by on 21. Feb, 2012 in Eye Care
Visual Acuity Definition Visual Acuity refers to the acuteness or clearness of vision. It measures how one can see well. It is simply defined as the smallest visible feature the eyes can distinguish. In 1861 the term visual acuity was thought of by Franciscus Donders describing the sharpness of vision defining it at a ratio between the visual acuity of the subject and the standard visual acuity. Dr. Hermann Snellen, a Dutch Ophthalmologist, published his famous letter chart using what he called optotypes in 1862. The design was based on 5×5 grid and Snellen defined standard vision as the ability to recognize one of his optotypes. The chart devised by [...]
Eye Strain
by on 17. Feb, 2012 in Eye Care
What is Eye Strain? Eye Strain is a discomfort in the eyes as a result of intense use such as reading and using a computer for prolonged period. Asthenopia is the medical term describing eye strain. It is extremely common and affecting almost all people. Ciliary body of the eye muscles which is responsible for accommodation is what is greatly affected by straining due to keeping the eye muscles in one position for a long period of time. It is annoying but is always not serious and usually goes away after resting the eyes. Eyestrain however, can indicate underlying eye condition and may be a symptom. Bad case of eyestrain [...]
Allergic conjunctivitis
by on 13. May, 2011 in Eye Care
Allergic Conjunctivitis Conjunctivitis or pink eye in common term, is accordingly classified in terms of its causative factor. Specifically, these classifications are (a) microbial conjunctivitis, (b) toxic conjunctivitis, and lastly, (c) allergic conjunctivitis. The latter type will be the case in point in this article. Allergic conjunctivitis is alternatively dubbed as immunologic conjunctivitis in the medical field. It is basically a hypersensitivity reaction that occurs due to two main reasons. More often than not, allergic conjunctivitis accompanies the occurrence of an allergic rhinitis or in layman’s term, hay fever. However, there are instances when allergic conjunctivitis occurs as an allergic response independent of any underlying factors. Patient’s who get afflicted [...]
Eye cyst
by on 07. Mar, 2011 in Eye Care
Eye Cyst, also known medically as “Chalazion” is the inflammation of the glands that are found on the eyelids that causes a lump on either the lower or upper eyelids. The lump is firm, soft or filled with fluid. It is otherwise, referred to as meibomian cyst, tarsal cyst or conjunctival granuloma. Picture 1: Eye cyst Image source : skincarephysicians.com Eyelid glands Meibomian glands are eyelid glands; it is also known as palpebral gland, tarsal or tarsoconjunctival gland. Human beings have at least 30-40 glands of the eyelids and these glands have openings that are tiny that secretes a liquid secretion of oil, sebum and mucus that are thick and [...]
Pink Eye Symptoms
by on 23. Feb, 2011 in Eye Care
Pink eye symptoms are commonly known as “Conjunctivitis.” It is characterized as inflammation and redness of the conjunctiva (covers the whites of the eye) and the inner part of the eyelids. It can affect one or both eyes. It disappears in 7-10 days. It is seen in both infectious and non-infectious causes. Infectious causes include virus or bacteria that are contagious; whereas, non-infectious causes include allergy, inflammations, chemical irritation and trauma. Pink eye may be visible in individuals of any age. Conjunctivitis is caused by a virus, bacteria, or any allergic reaction, and is common among children; but they can also occur in adults. Pink eye classification and symptoms Viral pink eye [...]
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