EYE DEFECTS

DEFECTS OF THE EYE
BACK TO HOME PAGE THE EYE PHOTORECEPTORS RODS CONES RHODOPSIN MECHANISM VITAMIN A REFERENCES		There are many eye related problems and defects of the eye, the main few are briefly discussed below: Defects of the eye: Myopia: (nearsightedness) This is a defect of vision in which far objects appear blurred but near objects are seen clearly. The image is focused in front of the retina rather than on it usually because the eyeball is too long or the refractive power of the eye’s lens too strong. Myopia can be corrected by wearing glasses/contacts with concave lenses these help to focus the image on the retina. Hyperopia: (farsightedness) This is a defect of vision in which there is difficulty with near vision but far objects can be seen easily.

Kidney Disease

Chronic kidney disease
Chronic kidney disease occurs when one suffers from gradual and usually permanent loss of kidney function over time. This happens gradually, usually months to years. Chronic kidney disease is divided into five stages of increasing severity (see Table 1 below). The term "renal" refers to the kidney, so another name for kidney failure is "renal failure." Mild kidney disease is often called renal insufficiency.
With loss of kidney function, there is an accumulation of water; waste; and toxic substances, in the body, that are normally excreted by the kidney. Loss of kidney function also causes other problems such as anemia, high blood pressure, acidosis (excessive acidity of body fluids), disorders of cholesterol and fatty acids, and bone disease.
Stage 5 chronic kidney disease is also referred to as kidney failure, end-stage kidney disease, or end-stage renal disease, wherein there is total or near-total loss of kidney function. There is dangerous accumulation of water, waste, and toxic substances, and most individuals in this stage of kidney disease need dialysis or transplantation to stay alive.
Unlike chronic kidney disease, acute kidney failure develops rapidly, over days or weeks.

• Acute kidney failure usually develops in response to a disorder that directly affects the kidney, its blood supply, or urine flow from it.
  
  
• Acute kidney failure is often reversible, with complete recovery of kidney function.
  
  

Men's Health Testicular Cancer

Testicular cancer forms in a man's testicles, the two egg-shaped glands that produce sperm and testosterone. Testicular cancer mainly affects young men between the ages of 20 and 39.

WHAT is a Varicocele in Men

You've heard of varicose veins — those swollen veins that sometimes show up in the legs. You've probably heard your grandma and her old lady friends talking about their varicose veins and never thought twice about them.
But hopefully you've never heard your grandma mention a varicocele, which is also a swelling of the veins. A varicocele happens just to guys, and you probably won't sit around and talk about it with your pals. That's because it occurs not in the legs but in a place a bit more private and a lot more tender — the scrotum. It's generally harmless and basically the same kind of thing as varicose veins in the legs. But what exactly is a varicocele and how do you get rid of it?

What Is a Varicocele?

In all guys, there's a structure that contains arteries, veins, nerves, and tubes — called the spermatic cord — that provides a connection and circulates blood to and from the testicles. Veins carry the blood flowing from the body back toward the heart, and a bunch of valves in the veins keep the blood flowing one way and stop it from flowing backward. In other words, the valves regulate your blood flow and make sure everything is flowing in the right direction.