Looking into the future.

Your article states that farsightedness farsightedness /far·sight·ed·ness/ (fahr-sit´ed-nes) hyperopia.

far·sight·ed·ness (fär

will be treated with these new electric lenses (Switch-a-Vision: Electric spectacles could aid aging eyes;' SN: 4/22/06, p. 243). With some tweaking, could nearsightedness nearsightedness /near·sight·ed·ness/ (ner-sit´ed-nes) myopia.

near·sight·ed·ness (nîr

and astigmatism

compound astigmatism that complicated with hypermetropia or myopia in all meridians.

corneal astigmatism that due to irregularity in the curvature or refracting power of the cornea.

irregular astigmatism that in which the curvature varies in different parts of the same meridian or in which refraction in successive meridians differs irregularly.

be treated as well? Could binoculars, telescopes, and microscopes use this technology?

ROGER CURNOW, GRAND RAPIDS, MICH.

Yes and yes, says Dwight P. Duston of PixelOptics in Roanoke, Va. However, he notes that it's instant switching between focus settings that distinguishes the new, liquid crystal lenses from standard lenses, not better vision correction.

COPYRIGHT 2006 Science Service, Inc.
No portion of this article can be reproduced without the express written permission from the copyright holder.

Reader Opinion

Article Details
Printer friendly Cite/link Email Feedback
Title Annotation:	LETTERS
Author:	Weiss, P.
Publication:	Science News
Article Type:	Letter to the editor
Date:	Jul 1, 2006
Words:	86
Previous Article:	Ten Worlds: Everything that Orbits the Sun.(Brief article)(Book review)
Next Article:	Gut feeling?(LETTERS)(Letter to the editor)

Related Articles
Most papers receive more letters. (letters to the editor)
People.
Letters to the Home Circle: The North Carolina Service of Pvt. Henry A. Clapp, Company F, Forty-fourth Massachusetts Volunteer Militia, 1862-1863.
Rethinking the rules. (Editor's Note).
Creating a lively letters page: how do you sustain a lively exchange with your readers? The Masthead editor collected advice from a number of...
Turf: a threat, or just a little sport?(Editor's Note)(Editorial)
The real thing is worth fighting for: we can help educate them through direct explanations as to why we don't print such letters.(Turf wars: the...
New research on the nature of letters and their writers.(Letter-writing demography)
H. P. Lovecraft Letters From New York.(Brief Article)(Book Review)
Turf or astroturf? A look at the scope of the "canned letter" phenomenon.(letters to the editor campaigns)