Band-aid, not cure: A good eye doctor will know there are mid range
prescriptions in addition to near sighted correction and long range focus.
For day long keyboard use get yourself some mid range prescriptions (with
bifocal "flat top" if you also need reading glasses). That is maximum size of
the upper mid range.
Even if you don't need glasses for reading or long focus, if your eyes differ
by just a little bit and are nearly co-dominant, your eye muscles constantly
flex just a bit to bring them into exact match when you are staring at a fixed
focal plane.
If you're under 35 or so, this little tug may be insignificant. As you age your
lens stiffens. When I got to about 50, having never previously needed glasses
at all, my eyes started getting "fuzzy" after about four continuous hours. Then
I was toast for about two hours, not just for the screen, but for any reading
or anything requiring clear focus.
(Taking a break helps, as previously mentioned in the thread.)
A classic case is one eye slightly near sighted and one eye slightly far
sighted which tends to mean you don't get glasses (or need them) until you are
old...
Good luck. If your eye doctor is NOT familiar with mid range focus plane
glasses, get someone new.
-----Original Message-----
From: oracle-l-bounce@xxxxxxxxxxxxx [mailto:oracle-l-bounce@xxxxxxxxxxxxx] On ;
Behalf Of Norman Dunbar
Sent: Thursday, June 18, 2020 3:38 AM
To: oracle-l@xxxxxxxxxxxxx
Subject: Re: Reducing screen time
Good Morning Kunwar,
In the UK we have this set of rules: https://www.hse.gov.uk/msd/dse/.
Also, I was educated into taking an eye break every 15-20 minutes, where you
look out the window or across the office etc, something to change where your
eyes are focussing.
Get up an walk around every hour or so - go to the loo, make a coffee etc. Good
for the eyes as well!
The crud we hear about "blue light" being *harmful* is "woo". It isn't a big
enough problem to make any difference to your eyes. It *might* have an effect
on your sleeping habits though - not that I have found it makes any difference.
One link is https://www.hse.gov.uk/msd/dse/ which
states:
White LEDs may actually emit more blue light than traditional light sources,
even though the blue light might not be perceived by the user.
This blue light is unlikely to pose a physical hazard to the retina. But it may
stimulate the circadian clock (your internal biological clock) more than
traditional light sources, keeping you awake, disrupting sleep, or having other
effects on your circadian rhythm.
HTH
Cheers,
Norm.
--
Norman Dunbar
Dunbar IT Consultants Ltd
Registered address:
27a Lidget Hill
Pudsey
West Yorkshire
United Kingdom
LS28 7LG
Company Number: 05132767
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