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Optics for aging eyes
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<blockquote data-quote="Pro2A" data-source="post: 1667096" data-attributes="member: 17889"><p>First thing....get those cataracts removed and get those store bought eye lens!!! I did and couldn't believe the difference. The colors really popped with vividness and vibrancy. No more glasses or contact lens for distance or reading. Could see in low light again....probably not like when I was 20, but way better than before surgery. (Do not buy the "they aren't bad enough yet" story. Tell your ophthalmologist that the cataracts are adversely impacting your quality of life...the criteria for insurance to cover the surgery!!! If he doesn't agree, get another ophthalmologist. Cataracts don't get any better, and the benefits of the surgery don't get better by waiting longer. You only lose the benefit while waiting.) You cannot appreciate what you have slowly lost over the years. Life is short, don't miss it. Do a little research on how optics really deliver performance. The more you understand, the more you will be able to evaluate the best solution for your needs. One aspect to consider is look for a scope that provides exit pupil size near 4mm which is about older eyes maximum opening even in low light. A larger exit pupil wastes light not reaching the eye. Too small of exit pupil also doesn't optimize viewable available light on the retina. This becomes more critical as aging occurs. Exit pupil diameter in mm = objective lens diameter in mm divided by scope power setting. (ie. 56mm/25 power = 2.2mm exit pupil....not optimum light utilization. 50mm/5power=10mm exit pupil....also not optimum. 44mm/10mm=4.4mm exit pupil....pretty close. 50mm/12.5 = 4mm....better choice.....gathers more light and optimizes exit light utilization at higher magnification. Also, an illuminated reticle that can be dimmed in low light is helpful in distinguishing dark object targets in shadows from the black reticle. Too bright reticle tends to wash out the darker target. Particularly for older eyes. For selecting which brand/model scope, everyone has an opinion based on their experience....and their eyes. Only your eyes will give you the best answer. In optics, beauty (clarify, resolution, etc.) is truly in the eyes of the beholder. You must actually see the scope in the field under actual conditions to accurately judge for yourself. That means going to a shooting range and making personal connections that will allow you to view their actual scopes under actual conditions. Scope opinions are like buttholes....very one has one, but it really only benefits the owner. Including me. <img src="data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" class="smilie smilie--sprite smilie--sprite1" alt=":)" title="Smile :)" loading="lazy" data-shortname=":)" /> <img src="data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" class="smilie smilie--sprite smilie--sprite1" alt=":)" title="Smile :)" loading="lazy" data-shortname=":)" /> <img src="data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" class="smilie smilie--sprite smilie--sprite1" alt=":)" title="Smile :)" loading="lazy" data-shortname=":)" /></p></blockquote><p></p>
[QUOTE="Pro2A, post: 1667096, member: 17889"] First thing....get those cataracts removed and get those store bought eye lens!!! I did and couldn't believe the difference. The colors really popped with vividness and vibrancy. No more glasses or contact lens for distance or reading. Could see in low light again....probably not like when I was 20, but way better than before surgery. (Do not buy the "they aren't bad enough yet" story. Tell your ophthalmologist that the cataracts are adversely impacting your quality of life...the criteria for insurance to cover the surgery!!! If he doesn't agree, get another ophthalmologist. Cataracts don't get any better, and the benefits of the surgery don't get better by waiting longer. You only lose the benefit while waiting.) You cannot appreciate what you have slowly lost over the years. Life is short, don't miss it. Do a little research on how optics really deliver performance. The more you understand, the more you will be able to evaluate the best solution for your needs. One aspect to consider is look for a scope that provides exit pupil size near 4mm which is about older eyes maximum opening even in low light. A larger exit pupil wastes light not reaching the eye. Too small of exit pupil also doesn't optimize viewable available light on the retina. This becomes more critical as aging occurs. Exit pupil diameter in mm = objective lens diameter in mm divided by scope power setting. (ie. 56mm/25 power = 2.2mm exit pupil....not optimum light utilization. 50mm/5power=10mm exit pupil....also not optimum. 44mm/10mm=4.4mm exit pupil....pretty close. 50mm/12.5 = 4mm....better choice.....gathers more light and optimizes exit light utilization at higher magnification. Also, an illuminated reticle that can be dimmed in low light is helpful in distinguishing dark object targets in shadows from the black reticle. Too bright reticle tends to wash out the darker target. Particularly for older eyes. For selecting which brand/model scope, everyone has an opinion based on their experience....and their eyes. Only your eyes will give you the best answer. In optics, beauty (clarify, resolution, etc.) is truly in the eyes of the beholder. You must actually see the scope in the field under actual conditions to accurately judge for yourself. That means going to a shooting range and making personal connections that will allow you to view their actual scopes under actual conditions. Scope opinions are like buttholes....very one has one, but it really only benefits the owner. Including me. :) :) :) [/QUOTE]
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