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RGP Contact Lenses – What Are They?

By | December 20, 2013|

What are Rigid Gas Permeable Contact Lenses?

The first contact lenses were made from the acrylic (plastic) known as polymethyl methacrylate (PMMA) or Plexiglas.

Back then the science of plastics was on the move as acrylic polymers were manipulated by crosslinking carbon chains with various elements like fluorine and silicone improving the amount of gases, oxygen being […]

Sunglasses, Part 2

By | June 26, 2013|

The American sunglass industry has done a good job of regulating itself, although some of their advertising is a bit grandiose. Still the sunglass industry has not stepped beyond those claims made by plenty of other industries.

In this article I address how sunglasses can help with reflections. Some sunglass producers tout elimination of 100% of […]

Choosing the Best Sunglasses

By | May 1, 2013|

How do you find good sunglasses? “The answer lies within you.” It smacks of the incantation of shaman doesn’t it? With sunglasses the answer fits like that T-shirt with the logo of your favorite ball team.

Mountain bikers want wrapping glasses that stick like glue and feel like silk, no backside reflection, no fogging, and sun […]

High Definition Eyeglasses

By | April 26, 2013|

This science improves vision for everyone, but is most impressive to those of us with complex prescriptions and/or progressive no-line bifocals. Still, if you are a glasses wearer you might be surprised by the intensity of vision available in high definition glasses regardless of your optical prescription.

Why was this science instigated? LASIK. What does LASIK […]

Contact Lens Prescriptions

By | April 16, 2013|

Contact lenses are either a Class II or Class III medical devices, and like Valium they require a prescription. Also like Valium if you abuse them they can cause problems.

In many states the length of validity for prescriptions is left to the discretion of the doctor. In the State of Washington it is also […]

Contact Lens Materials

By | April 15, 2013|

 

Firm Contact Lenses

The original contacts were hard lenses made out of polymethyl-methacrylate (PMMA) or Plexiglas. A Royal Air Force pilot was hit in the face by debris from the Plexiglas windshield of his fighter plane. Particles of PMMA remained in his eye with no problems, so it was a good place to begin contact lenses.

PMMA […]

Latisse and Making Prettier Lashes

By | April 6, 2013|

Here is my take on using Latisse:

Latisse is the glaucoma drug bimatoprost. Besides controlling eye pressures, bimatoprost stimulates the eyelash follicles to grow lashes as well as adding some pigment and thickness. It is a nice effect.

There is also some evidence that Latisse and similar prostaglandin analogs darken the skin. So you should avoid getting […]

LASIK and Life

By | March 19, 2013|

Sometimes called flap-and-zap, LASIK is a computer numeric controlled process incorporating the excimer laser, an ultraviolet laser. With only a ten degree change in tissue temperature, the excimer removes corneal tissue like the vanishing coin in a magician’s hand. Now you see it. Now you don’t. It is a truly miraculous evaporation process called ablation. […]

LASIK, Getting Rid of Glasses and Contact Lenses

By | March 19, 2013|

Every year many who need glasses or contact lenses opt for LASIK, but LASIK is only one of many refractive surgeries:

1. RK – Radial keratotomy
2. CK – Conductive keratoplasty
3. Intacs – Intrastromal rings
4. RL – Refractive lensectomy
5. ICL – Implantable contact lens
6. LASIK – Laser-Assisted in Situ Keratomileusis
7. PRK –Photorefractive keratectomy

This list incorporates all the […]

Glasses That Change Color

By | March 19, 2013|

In the 1940’s Corning Glass Company started experimenting with glass that changed color when exposed to certain kinds of light. This was the beginning of the technology of photochromics.

In 1962 Corning made commercially available Photogray glass by putting silver halide crystals into molten glass. Silver halide is the chromophore or the chemical that makes it […]

Vitamins, Supplements & AREDS

By | March 19, 2013|

Makers of products with names like MiteHeeMan and SitePerfecto are not only convincing athletes and sportsmen of better golf scores, sex lives, and poker earnings, they are persuading archers and marksman they can see a fly on a fence post at fifty yards in foggy furrow. Everyone needs daily minimums of vitamins and minerals, but optimal doses are unknown. […]

Eclipses, the Dark Side

By | March 19, 2013|

If peered at long enough a bright light can cause damage to the nerve tissue layer that forms the inside lining of the back wall of the eye. This clear layer is known as the retina. It’s that which stands between us and blindness. The human eye concentrates light and heat about the same as […]