20/20

Contact Lenses

May 2021 Contact Lenses

Soft Contact Lenses Turn 70

In 1951, Czech chemist Otto Wichterle developed the first soft contact lens polymer made from hydrophilic hydroxyethyl methacrylate (HEMA). The water-loving lens allowed more oxygen to pass through to the cornea. The early lenses were made by filling small molds with the polymer, then allowed to harden. The resulting “buttons” were then cut to the desired prescription. The edges had to be smoothed by hand. Clearly, a more efficient way to make the lenses was needed.
January 2021 Contact Lenses

Slime: The Contact Lens Connection

You read that right. There’s a connection between contact lenses and that sticky, stretchy creation that’s all the rage with kids. It seems that contact lens solution is a key ingredient for homemade slime. Who figured that one out? I couldn’t find the responsible party, but a little of the history and chemistry behind slime will give some insight as to why it works.
November 2020 Eyes/Optics

Optical Rock

I knew Andy Karp, Group Editor Lenses and Technology for Vision Monday and 20/20 Magazine, was a musician, but I didn’t know the extent of his talents.
November 2020 Eyes/Optics

Necessity is the Father of Invention

What happens when someone who needs medically necessary scleral contact lenses loses the dexterity to insert and remove them? Why, he invents a robot to do it for him!
November 2020 Eyes/Optics

The New Normal

I get calls all day at work asking what our “new normal” is. Patients inquire about the length of exams, how to proceed when they arrive, anything that might have changed since COVID hit. 
October 2020 Eyes/Optics

Contact Lens Buffet

On October 1, the American Optometric Association (AOA) posted a notice about a recall of AquaSoft contact lenses by 1-800 CONTACTS. AquaSoft is the company’s private label brand, manufactured by Visco Technology in Malaysia.
October 2020 Eyes/Optics

Navigating Through the Fog

Thank you to our Ms. Specs readers who wrote in response to her columns on anti-fog techniques and requested more information about anti-fog products! 
October 2020 Eyes/Optics

IOT Free-form Insights Part 5 - Standard Versus Customized PAL's - Visual Perception and Wearer Satisfaction Rates Analyzed

Real people wear lenses and each one is a unique individual. Therefore, it is no surprise that in wearer trials, customized PALs were preferred over standard PALs.
October 2020 Eyes/Optics

PPG TRIBRID® Lens Material: Beautiful Soup

In Lewis Carroll’s Alice in Wonderland, the Mock Turtle sings longingly of “Beautiful Soup.” There’s another ‘beautiful soup’ you should know about. It’s the chemical solution used to make ophthalmic lense
October 2020 Eyes/Optics

Your Lenses and Devices – Free and Clear with ZEISS Wipes and Spray

The smudge on your glasses is driving you nuts, so you dig into your pocket or purse for that trusty lens cloth. There it is – crumpled and dirty with a breath mint stuck to it.

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