The clarity of vision (acuity) is dependent on the refraction of parallel light rays and the sharp focus of this light on the retina. Normally the ciliary muscles of the lens can remain relaxed and distant objects can be seen clearly, albeit small depending on the distance. This normal vision is known as emmetropia. To see >> Read More ...
The eye has a rich blood supply similar to other highly active parts of the body. The retina which is the photosensitive inner layer of the eyeball responds to light stimuli and generates impulses that travel via the optic nerve to the brain. This accounts for the sense of vision. The central retinal artery supplies blood >> Read More ...
Redness of the eye, or ocular redness, is a common ailment that may be a symptom of some ocular or even non-ocular disorder or can arise acutely with minor irritation or injury of the eye. It is often accompanied by itching. On its own, excessive redness of the eye is not serious particularly if it passes within a short >> Read More ...
The eye is a highly sensitive organ to light, pressure and other sensations like itching and pain. Since it is exposed to the environment and lacks the protection of skin, apart from the eyelids, the eyes are prone to injury and diseases. Its location and closeness to several other highly sensitive structures may also be a >> Read More ...
The wall of the eyeball has three main layers – the outer fibrous layer (sclera, cornea), middle vascular and muscular layer (choroid, ciliary body and iris) and the inner neurosensory layer (retina). All three layers adhere to each other and both the outer and inner layers are highly dependent on the rich blood >> Read More ...
Light enters the eye through the transparent cornea and passes through the pupil, the diameter of which is determined by the iris. It then passes through the lens of the eye which bends the light (refraction) to focus it on the back of the retina. The image projected on the retina stimulates receptors that transmits >> Read More ...
The human eye consists of the eyeball, optic nerve, orbit and appendages (eyelids, extraocular muscles and lacrimal glands). While the eyeball is the actual sensory organ, the other parts of of the eye are equally important in maintaining the health and function of the eye as a whole. The structure of the human eye is such >> Read More ...
Hyphema Definition Hyphema is a condition where there is a collection of blood inside the front of the eye (anterior chamber). The accumulation of the blood within the anterior chamber is usually visible. It occurs with injury to the eye, during or after surgery and in rare cases it may arise as a consequence of certain >> Read More ...
Eyestrain or eye fatigue has become common place in everyday life for many of us. Most of the time it is nothing more than an annoyance but for some people it can be quite debilitating. Fortunately eyestrain does not lead to any permanent complications but the symptoms may recur on such a frequent basis that it affects a >> Read More ...
Our body can only sustain activity for a certain period of time in a day before it needs to “recharge” with a restful sleep. One of the ways that you know that is time to rest is when the eyelids becoming “heavy”. This is a common way to describe the difficulty in keeping the eyelids open. The >> Read More ...
