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<blockquote data-quote="WayneF" data-source="post: 324737" data-attributes="member: 12496">I would strongly hope you review your notions with your optometrist, before you ignore his prescription you paid for.&nbsp;&nbsp; I think you are ignoring 100% of the details.
IMO, this statement is simply nonsense, at best a misunderstanding.&nbsp;&nbsp; It is not about any focal point distance. The test is about if your eyes can see clearly enough to resolve normal detail on the standard chart.&nbsp; There was nothing in the exam office at 25 feet.
Your diagram is incorrect, regarding the camera viewfinder seeing 20/20. I don't actually know what that note means, but the subject is NOT about the camera or the viewfinder. The camera projects its image from its lens onto the ground glass screen in the viewfinder.&nbsp; We don't question the camera, it never wears glasses.&nbsp; <img src="data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" class="smilie smilie--sprite smilie--sprite1" alt=":)" title="Smile&nbsp; &nbsp; :)" loading="lazy" data-shortname=":)" />But then we look at that image on the ground glass screen (at a few inches, which requires the eyepiece lens to do it), which is much like viewing a projected slide show on a screen... in that the screen is NOT at the same distance as the subject.&nbsp;&nbsp; The camera diopter adjustment does help us see&nbsp; that ground glass image.&nbsp;&nbsp; The subject distance is no longer any factor at all.&nbsp; Eyeglass prescriptions are written in diopters too.You really should ask your optometrist for his opinion about your prescription. <img src="data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" class="smilie smilie--sprite smilie--sprite1" alt=":)" title="Smile&nbsp; &nbsp; :)" loading="lazy" data-shortname=":)" /></blockquote>

[QUOTE="WayneF, post: 324737, member: 12496"] I would strongly hope you review your notions with your optometrist, before you ignore his prescription you paid for. I think you are ignoring 100% of the details. [LEFT][COLOR=#000000] IMO, this statement is simply nonsense, at best a misunderstanding. It is not about any focal point distance. The test is about if your eyes can see clearly enough to resolve normal detail on the standard chart. There was nothing in the exam office at 25 feet. [/COLOR][/LEFT] Your diagram is incorrect, regarding the camera viewfinder seeing 20/20. I don't actually know what that note means, but the subject is NOT about the camera or the viewfinder. The camera projects its image from its lens onto the ground glass screen in the viewfinder. We don't question the camera, it never wears glasses. :) But then we look at that image on the ground glass screen (at a few inches, which requires the eyepiece lens to do it), which is much like viewing a projected slide show on a screen... in that the screen is NOT at the same distance as the subject. The camera diopter adjustment does help us see that ground glass image. The subject distance is no longer any factor at all. Eyeglass prescriptions are written in diopters too. You really should ask your optometrist for his opinion about your prescription. :) [/QUOTE]

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