Frequently Asked Questions
Why are contact lenses blue?
Often, contact lenses are tinted a faint blue to make them more visible when immersed in cleaning and storage solutions – this is done to help the user during preparation and do not help correct any defect in vision once they have been properly fitted to the eye.
Some cosmetic lenses are deliberately colored to alter the appearance of the eye – you always wanted green eyes? No problem, you can get cosmetic contact lenses in a wide variety of colors. Even with clear lenses, that is, lenses which offer no correction to your vision, but are worn purely for cosmetic purposes.
Some lenses now have a thin surface treatment which is a UV coating; thiss offeres UV protection to the wearer’s eyes and helps to prevent damage to the eye’s natural lens.
Costume contact lenses can come in a wide variety of colors for a number of purposes… including to frighten people! Blue is not usually the color of choice for such purposes but it is also a possibility.
Who Invented the Contact Lens?
Leonardo Da Vinci is credited with first coming up with the idea in theory, however it was many years before the first actual glass contact lenses were actually made and fitted to someone’s eyes.
In 1887 a German glassblower, F.E. Muller, produced the first eye covering to be seen through and tolerated by most people. The following year, Adolf Eugen Fick constructed and fitted the first successful contact lens. While working in Zürich, Switzerland Fick constructed the first usable lenses and experimentally fitted them on rabbits, then on himself, and lastly on a small group of volunteers. These early lenses were made from heavy blown glass and were 18–21mm in diameter. Fick filled the empty space between cornea/callosity and glass with a dextrose solution. He published his work, “Contactbrille”, in the journal Archiv für Augenheilkunde in March 1888. These early efforts were very hard on the eyes and could only be worn for a few hours at a time.
Soft Contact Lenses
Soft lenses were first invented in 1959 by two Czech chemists.
How Popular Are Contact Lenses?
It has been estimated that 125 million people use contact lenses worldwide including somewhere between 28 and 38 million contact users in the United States and 13 million in Japan. The types of lenses used in each country varies considerably with hard lenses accounting for over 20% of the lenses sold in Japan, the Netherlands and Germany but less than 5% in Scandinavia.
What are Intraocular Lenses?
Intraocular lenses, also known as an implantable contact lenses, are special small corrective lenses surgically implanted in the eye’s posterior chamber behind the iris and in front of the lens to correct higher degrees of myopia and hyperopia.
If I have a prescription for one brand of lens, can I replace it with another?
Unfortunately, not. Contact lenses come in different sizes and must be fit to your eye by an Optometrist or Ophthalmologist. online lens retailers can only sell you contact lenses that you are already wearing successfully. If you would like to change the type or brand of lens you are wearing, your eye care professional will need to help you make that choice.