When looking at a mirror, that fixed point is usually the person himself.
That’s why if you hold a mirror in front of a person and keep rotating it slightly right and left, his eyes will keep jerking right and left to follow his own image, and that’s quite entertaining to watch.
This is sometimes used by ophthalmologists to detect malingering patients pretending to be blind (to escape military service for example). The patient won’t be able to resist following his own image.
I LOVE physical exam findings/tests that catch malingerers in the act!
If your vision in your right eye has repeated episodes of “my vision looks like butter smeared all across it” every day for 6 months, maybe you should see a doctor about that sooner.
Especially if you have atrial fibrillation, but refuse to take warfarin (a blood thinner to prevent blood clots from developing in your jiggling atria) and just take a “natural supplement to prevent clots” instead.
And you’ve had 8 heart attacks, but refuse to get cardiac vessel catheterization.
Because guess what, sir?
Now your massively clotted and narrowed carotid artery refuses to let the blood flow through properly.
(99% occlusion of carotid artery on ultrasound — yeesh.)
I work for an ophthalmologist. This morning a patient phoned in requesting a conversation with the doctor. I usually screen the calls but because he was in the rooms and we had hit a rather quiet lull I put the call straight through.
*Doctor walks out*
‘Do you know what that patient phoned in for?’
‘He said, when he takes his glasses off his vision gets really blurry’.
‘Haha…wow I could have taken that myself.’
Excellent, thanks for that “update” to our discussion about Deep Brain Stimulation!
I had seen part of that pro-videogame article (the section on using the Kinect to operate an MRI image viewer in the OR), but the other section about identifying kids with visual problems QUICKER with the 3D gaming handhelds was really slick!
Yay science! :)
***Pending Cranquis-Mails: 25***
Greetings and salutations, Blurred Beluga —
Yeesh — if your eyesight is actually getting worse quick enough for you to notice it that much, you need to get it checked out soon. Aside from the common ocular causes of “nearsightedness”, there are quite a few medical conditions which could be involved, including diabetes, thyroid problems, neurologic problems, and electrolyte imbalances. I’m not an eye specialist, so I’m not sure whether the chlorinated pool can be blamed for it.
However, I do know that those hokey internet articles which claim that “glasses only serve as a crutch” are ironically correct: glasses or contact lenses act as an accessory lens for eyes whose natural lenses are not working well on their own, in the same way that a real crutch functions as an accessory leg for a person whose leg is broken. DUH! Vision is all about light waves and the properties of bending and focusing light on a point; if your built-in vision equipment isn’t working, you add another lens to the system to compensate.
Furthermore: If the optical portion of your eye (a complex INTRA-eyeball mechanism involving a self-adjusting lens and iris which are controlled by the autonomic [i.e., reflexive, not-consciously-controlled portion of the nervous system] nervous system), which in turn integrates with a series of nerves and brain centers to convert light waves into brain signals, doesn’t work, how in the heck could “eye exercises” (which would likely involve the muscles AROUND the eyes, which only control which way the eyes are pointing and how your eyelids stay open) improve your vision??! Hogwash.
Ok, go see a real eye doctor, and stop reading the internet (hey, maybe THAT’S why your vision is getting worse! What kind of naughty websites have you been visiting? LOL!) :)
***Pending Cranquis-Mails: 18***