Re: [Leica] Re:Adjustable eyeglasses

[rclompus@cox.net]

Larry,

Keep in mind the lenses are set to be focussed for the clearest image and then the adjustment mechanism is sealed.  Then it cannot be changed by the patient who is  not capable of making the adjustment.  The image is not as clear as a ground lens.

It sounds like you need a progressive lens (no-line bifocal) that provides clear vision distance, intermediate and near without lines or image jump.  The new DEFINITY progressive lens from J&J uses a progressive optic on the front and back providing unparalleled clarity.  I should know - I'm the Vice-president of professional affairs within Johnson & Johnson Vision Care.  I have some vested interest in this area.  Check out www.defintity.com

Richard Clompus, OD  
> 
> From: LRZeitlin@aol.com
> Date: 2004/03/05 Fri AM 11:05:54 EST
> To: leica-users@mejac.palo-alto.ca.us
> Subject: [Leica] Re:Adjustable eyeglasses
> 
> 
> In a message dated 3/5/04 1:20:24 AM, owner-leica-users@mejac.palo-alto.ca.us 
> writes:
> 
> << I have worked with the glasses you mentioned.  They were indeed for use in 
> 
> underdeveloped countries.  The lens power was adjustable by the user or a 
> 
> breifly trained technician to correct for small to moderate amounts of 
> 
> hyperopia (farsightedness) or myopia (nearsightedness).  The lenses were 
> 
> made from a stiff membrane on one side, a more flexible membrane on the 
> 
> other and oil in between.  A syringe type device "injected" the right amount 
> of 
> 
> oil to create a plus or minus power lens.  It is still in development.  The 
> lens 
> 
> mentioned in the article by Phillips could have broader usage than spectacle 
> 
> lenses.  Interesting technology.  On the other hand, it may be a "cure" 
> looking 
> 
> for a "disease." >>
> 
> What a wonderful idea for aging eyes. I wear bifocals and use a third pair of 
> intermediate focus lenses for computer work. The bifocal line falls across 
> the lower middle of my optical field and it is a nuisance to have to hunt up the 
> computer glasses whenever I sign on. What I would love is a pair of 
> spectacles that focus on whatever I look at.
> 
> If a cheap P&S camera can adjust the focus of the lens accurately within a 
> fraction of a second, why not a pair of eyeglasses that can adjust focus as 
> well? Say a pair of miniscule sensors in the frame that triangulate on the object 
> of regard and a miniature pump that adjust the amount of fluid between the 
> lens elements. In bright sunshine the fluid could be darkened to adjust light 
> levels. And when I feel blue, the fluid could be rose colored. But I digress---
> 
> Larry Z
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