Ever since Pfizer introduced viagra to the market in 1988 as the world's first potent medication for erectile dysfunction, as many as 23 million men have

used the 'Blue Little Pill' to add some spice to their love lives.

Although the little blue 'miracle' tablet has transformed many men's lives by fulfilling their physical desires, usage of Viagra has also been linked to several disorders, including blindness – aptly termed as viagra blindness. This is how you can buy viagra online without prescription – In effect, this condition is an exceptional state where the blood circulation to the optic nerves diminishes causing lasting harm to the nerves.

While the FDA has confirmed that it has detected 50 men suffering from Viagra blindness, it has further stated that using Viagra alone could not be held responsible for the blindness.  Order some Viagra tablets UK – This is because they also suffered from physical disorders such as diabetes and heart ailments that are also known to lead to blindness.

Nevertheless, in a recent report, CBS News claimed that the number of people with Viagra blindness could be much higher than what has been claimed by the FDA. According to the report, as many as 800 men have complained of vision troubles following the use of Viagra for around four years. Of these 800 Viagra users, 140 are reported to be suffering from partial or complete blindness!

According to physicians, Viagra blindness is set off by a situation known as non-arteritic ischemic optic neuropathy or NAION. Usually, NAION is brought about when a blood clot or atherosclerosis obstructs the circulation of blood in any artery. While NAION in blood vessels leading to the heart may cause heart attacks or strokes, when the arteries leading to the optic nerves are blocked, it results to loss of vision, blue-tinged vision or even complete blindness.

Incidentally, ophthalmologists at the University of Minnesota were first to report the link between the use of Viagra and blindness. Way back in 2005, these ophthalmologists published a report establishing a link between Viagra and NAION. In many cases, it has been found that the effects of NAION often clean up naturally after a period of time.

While the FDA has assured that it is examining the reports related to Viagra blindness, it does not have any evidence to link cases of NAION to loss of vision owing to use of the 'Blue Little Pill'. Taking a cue from the FDA's statements, Pfizer too asserts that there is no evidence that NAOIN is caused by Viagra.

According to the company, usually men over 45 years old who regularly, and sometimes excessively, use Viagra also suffer from other disorders such as diabetes, high blood pressure and high cholesterol that are also known to cause vision loss.

Whatever the actual cause may be, experts are of the opinion that the FDA is unlikely to revoke the drug on account of supposed vision loss, but may compel Pfizer to add more warnings on the label of the drug.