Are There Other Indications of Contact Lens Strength Other Than the Digits Listed on the Cases?
January 1st, 2011 | See the Top Answers to this Question Below
I went for an exam and my doctor told me my prescription had changed a little. Upon receiving a new set of trial lens from him, the powers of each lens were exactly the same. He said that doesn’t mean anything, the prescription strength can still be different based on which contact lens is prescribed, due to the shape (spherical or aspherical) and the material and thickness.
Is this true? If so, this is remarkable, and I think I should be trying more brands of lenses.
Also a side question – he told me that PureVision by Bausch and Lomb, being aspherical, can help me treat my astigmatism to a slight degree without going to toric lenses. But from their website, it seems the aspherical design is just to help improve sharpness over regular spherical lenses for (I assume) regular users, i.e., non-astigmatic users. Is what he said true?
I felt rushed the whole visit. I really want to try Air Optix but he told me to try these first for a few days. Shouldn’t I be allowed to try a few types to pick what feels best and looks sharpest? I’ve worn lenses for ten years.
More Contact Lens Websites:
- Air Optix Night and Day Aqua Contact Lenses – $28.39/box + Free S/H | Cheap Contact Lenses (Acuvue Oasys, Focus Dailies etc.)
- Bausch and Lomb Biotrue mimics natural tears for best contact lens solution – Smarter Goods
- Fox News – Spring Cleaning For Bausch and Lomb (VIDEO) | meredith haberfeld
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Posted in Contact Lenses | 
Tags: air optix, Astigmatism, bausch and lomb, contact lens, few days, prescription strength, purevision, shape, sharpness, side question, spherical lenses
A contact lens (also known simply as a contact) is a corrective, cosmetic, or therapeutic lens usually placed on the cornea of the eye. Leonardo da Vinci is credited with describing and sketching the first ideas for contact lenses in 1508[citation needed], but it was more than 300 years later before contact lenses were actually fabricated and worn on the eye. Modern soft contact lenses were invented by the Czech chemist Otto Wichterle and his assistant Drahoslav Lím, who also invented the first gel used for their production.
Contact lenses are tinted a faint blue to make them more visible when immersed in cleaning and storage solutions. Some cosmetic lenses are deliberately colored to alter the appearance of the eye. Some lenses now have a thin surface treatment which is a UV coating; this helps to reduce UV damage to the eye’s natural lens.[1]
It has been estimated that 125 million people use contact lenses worldwide (2%),[2] including 28 to 38 million in the United States[2] and 13 million in Japan.[3] The types of lenses used and prescribed vary markedly between countries, with rigid lenses accounting for over 20% of currently-prescribed lenses in Japan, the Netherlands and Germany but less than 5% in Scandinavia.[2]
People choose to wear contact lenses for many reasons, often due to their appearance and practicality.[4] When compared with spectacles, contact lenses are less affected by wet weather, do not steam up, and provide a wider field of vision. They are more suitable for a number of sporting activities. Additionally, ophthalmological conditions such as keratoconus and aniseikonia may not be accurately corrected with glasses.
Yes you probably should.
An Optometrist has nothing to sell but his time.