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Yelaina's Diary - Newbie
#38
(09-17-2015, 07:04 PM)Yelaina Wrote: I have a question for David or Nancy, or people that are close to getting their vision perfect.
In filming or photography you will find pictures with items zoomed in, and the background a blur, or the foreground a blur and an object in the background brought to sharpness.
Is that what you do to see clearly, or to see normal, or what you would consider normal?
I never had perfect vision, maybe when I was in preschool, but I don't remember much.

For example:
https://www.youtube.com/watch?v=mBlx2WjaJvM
1:40 (cake zoomed in the coffee pots blurry, cake zoomed out and coffee pots become sharp and clear)
1:50 (utensils zoomed out, utensils zoomed in as background goes blurry)

Is that how your vision work David or Nancy?

Hi Yelaina,

While there are some similarities with a camera and the human visual system, there are many dissimilarities, so many it would probably bore you to no end to describe them. The main principles of normal sight include seeing with central fixation, constant relaxed movement that energizes and maintains a sharp image, and interest and attentiveness to what you are looking at. Vision is negatively impacted when any one of these is lacking, for whatever reason, mentally, emotionally, physically. When you see with central fixation, the small area you are looking at is always seen best, the rest of the field is worse, whether that is near, far, or equidistant. So you are essentially correct in that what you are seeing at the nearpoint is sharper than what is in the distance (or even a point closer to you), but because your fovea and attention can only be on one spot best at a time; it cannot be split equally without some type of strain. The physiology of the retina, nerves and brain dictate that it has to operate this way, if it is to operate optimally. You may be aware of other objects nearer or farther in the periphery, but your attention is predominantly on one thing, one small area at a time. Unlike the eye, cameras will record everything in their field equally clear at [X] distance, they don't have a fovea. The same snapshot from a normal eye would reveal a small area clear, and lessening of clarity the further it is removed from the central point. Also, due to binocularity, having input from 2 eyes, things closer or further away will split into 2 images. Our attention is on the fused image, and our focal point in each moment.

OK, before I bore you if not already so, just wanted to say that I don't think it's something you really have to concern yourself with, the visual system will take care of itself in that regard if you are working on those key principles of fixation, relaxed motion, and attentiveness.

Best,
Andrew
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Messages In This Thread
Yelaina's Diary - Newbie - by Yelaina - 10-24-2014, 08:46 AM
RE: Yelaina's Diary - Newbie - by RSW2892 - 10-25-2014, 05:55 AM
RE: Yelaina's Diary - Newbie - by Yelaina - 10-25-2014, 04:30 PM
RE: Yelaina's Diary - Newbie - by Yelaina - 10-27-2014, 06:14 PM
RE: Yelaina's Diary - Newbie - by Yelaina - 10-28-2014, 01:36 PM
RE: Yelaina's Diary - Newbie - by Yelaina - 10-28-2014, 07:33 PM
RE: Yelaina's Diary - Newbie - by Nancy - 10-29-2014, 09:10 AM
RE: Yelaina's Diary - Newbie - by Yelaina - 11-02-2014, 08:38 PM
RE: Yelaina's Diary - Newbie - by RSW2892 - 11-02-2014, 09:38 PM
RE: Yelaina's Diary - Newbie - by Yelaina - 11-03-2014, 07:10 AM
RE: Yelaina's Diary - Newbie - by Nancy - 11-03-2014, 08:36 AM
RE: Yelaina's Diary - Newbie - by Yelaina - 11-20-2014, 05:15 AM
RE: Yelaina's Diary - Newbie - by Yelaina - 12-31-2014, 02:26 PM
RE: Yelaina's Diary - Newbie - by Bifocal - 01-02-2015, 02:04 AM
RE: Yelaina's Diary - Newbie - by Yelaina - 01-02-2015, 07:53 AM
RE: Yelaina's Diary - Newbie - by Yelaina - 01-06-2015, 06:27 AM
RE: Yelaina's Diary - Newbie - by Yelaina - 12-04-2014, 08:35 PM
RE: Yelaina's Diary - Newbie - by Yelaina - 01-09-2015, 06:18 PM
RE: Yelaina's Diary - Newbie - by bloobi - 01-10-2015, 04:24 AM
RE: Yelaina's Diary - Newbie - by David - 01-23-2015, 02:40 AM
RE: Yelaina's Diary - Newbie - by Yelaina - 01-23-2015, 05:04 PM
RE: Yelaina's Diary - Newbie - by Bifocal - 01-24-2015, 09:58 PM
RE: Yelaina's Diary - Newbie - by bloobi - 01-25-2015, 02:33 AM
RE: Yelaina's Diary - Newbie - by arocarty - 01-25-2015, 04:36 AM
RE: Yelaina's Diary - Newbie - by Yelaina - 01-27-2015, 12:58 PM
RE: Yelaina's Diary - Newbie - by arocarty - 01-29-2015, 04:07 AM
RE: Yelaina's Diary - Newbie - by Bifocal - 01-29-2015, 07:22 PM
RE: Yelaina's Diary - Newbie - by Yelaina - 01-28-2015, 09:22 AM
RE: Yelaina's Diary - Newbie - by clarknight - 01-29-2015, 12:54 PM
RE: Yelaina's Diary - Newbie - by Aureus - 01-30-2015, 12:25 PM
RE: Yelaina's Diary - Newbie - by Yelaina - 03-21-2015, 07:26 PM
RE: Yelaina's Diary - Newbie - by sleepmaster - 04-04-2015, 07:18 AM
RE: Yelaina's Diary - Newbie - by Yelaina - 04-14-2015, 05:08 AM
RE: Yelaina's Diary - Newbie - by sleepmaster - 04-21-2015, 07:49 AM
RE: Yelaina's Diary - Newbie - by Yelaina - 04-26-2015, 02:02 PM
RE: Yelaina's Diary - Newbie - by sleepmaster - 04-27-2015, 06:11 AM
RE: Yelaina's Diary - Newbie - by Yelaina - 09-17-2015, 07:04 PM
RE: Yelaina's Diary - Newbie - by arocarty - 09-18-2015, 06:26 AM
RE: Yelaina's Diary - Newbie - by David - 09-21-2015, 02:22 PM
RE: Yelaina's Diary - Newbie - by Yelaina - 10-04-2015, 04:21 PM
RE: Yelaina's Diary - Newbie - by Yelaina - 09-26-2015, 07:22 AM
RE: Yelaina's Diary - Newbie - by Nancy - 09-26-2015, 09:11 AM
RE: Yelaina's Diary - Newbie - by David - 10-04-2015, 09:55 PM
RE: Yelaina's Diary - Newbie - by Yelaina - 10-05-2015, 06:25 AM
RE: Yelaina's Diary - Newbie - by Nancy - 10-05-2015, 09:47 AM
RE: Yelaina's Diary - Newbie - by Yelaina - 10-05-2015, 11:26 AM
RE: Yelaina's Diary - Newbie - by Yelaina - 10-07-2015, 07:02 AM
RE: Yelaina's Diary - Newbie - by Yelaina - 10-10-2015, 06:52 PM
RE: Yelaina's Diary - Newbie - by Yelaina - 10-13-2015, 03:31 PM
RE: Yelaina's Diary - Newbie - by Yelaina - 02-04-2016, 01:06 PM
RE: Yelaina's Diary - Newbie - by Nadia - 02-06-2016, 04:12 PM
RE: Yelaina's Diary - Newbie - by Yelaina - 02-17-2016, 12:51 PM
RE: Yelaina's Diary - Newbie - by Yelaina - 02-21-2016, 08:00 AM