SOLA Computer lenses (Alternatives)

I'm a bit confused.

Some web sites sell SOLA computer-use glasses for around $70.
I went to a local eye store and they told me I would need an exam and
spend around $230 for the same type SOLA setup.

Is it a different (custom) lense that they are giving me or are they
just milking me for some extra $$?

BTW, I have very good eyesight and never wore glasses. The computer
monitors though, cause major eye strain for me. According to some
posts, SOLA type lenses may help.

Thanks
Mark

 

Sola is a lens manufacturer, like Ford makes cars. Ford makes many models
including Lincolns and Festivas. Even for a particular car, there are many
options that can dramatically affect the cost.

Sola makes different models of lenses, and most of them come in different
materials. Usually the lower the index the cheaper the lens. "Regular
Plastic" (also known as CR-39 or hard resin) are usually the least
expensive, and the cost goes up as the index increases. As then index
increases, less material is necessary and the lenses are usually thinner
(and therefore lighter), although higher index material usually has lower
quality optical quality.

In order to be an educated consumer, you need to compare exact
manufacturers, lens model, and material, and coatings.