…a great way to stay on top of the dynamic field of Opticianry and make some friends in the process.
…a great way to stay on top of the dynamic field of Opticianry and make some friends in the process.
This new format is great. For those of you who want to know what I’m working on, I’m doing several projects. I tend to do projects in series as opposed to one at a time.
Things I’m doing include,
Not too long ago in the field of opticianry, iseikonic lenses were a common topic. I asked some seasoned opticians and an optometrist to find out why iseikonic lenses have decreased in popularity.
For those of you who don’t know, iseikonic lenses are lenses in which the magnification has been balanced. Each lens produces a certain amount of magnification or minification (small-ification if you will). Differing magnifications become a problem if there is a significant disparity between the two lenses. Orthodoxy holds that a difference of 5% magnification or more is enough to break fusion in most individuals. The difference in image size produced by the difference in magnification is called aniseikonia. Fusion is the process in which the two eyes combine their respective images into one. When fusion breaks, people complain of diplopia, or double vision. Some people who do not break fusion, but still have magnification differences of over 1%, may complain of headaches and nausea when wearing glasses that do not correct for the magnification difference. Some people with a high astigmatism that significantly supercedes any astigmatism in the other eye will also experience similar problems. People in this category have meridional aniseikonia.
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Optician n. One who is extensively trained in the interpreting of ophthalmic prescriptions and applies that knowledge to obtain the optimum visual and safety performance for the patient in a pair of spectacles or contact lenses.
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Friend n. 1. A person whom one knows, likes, and trusts. 2. A person whom one knows; an acquaintance. 3. A person with whom one is allied in a struggle or cause; a comrade. 4. One who supports, sympathizes with, or patronizes a group, cause, or movement.
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