FourEyedTrackWorld
 

[Closed] FourEyedTrackWorld

16 Posts
9 Users
0 Reactions
105 Views
Posts: 76786
Free Member
Topic starter
 

Following on from my earlier thread,

I picked up my first ever pair of glasses today. If I look straight through them then they're great, everything is sharp and bright, and stereoscopic vision is a thing, who knew! It's like watching a 3D movie.

However, if I focus on something and move my head, stuff moves. Like, if I turn my head to the right things move to the right so I'm looking through the lenses at an angle rather than face on, it's like horizontal width is getting shorter. Is this normal and something I just need to get used to, or should I be taking them back? It's kinda disorienting, and if I'm driving then really I want objects to be where I think they are! I mentioned it to the lass in SpecSavers and she wittered something about astigmatism and sent me on my way.

Cheers.

 
Posted : 24/02/2020 7:55 pm
Posts: 13554
Free Member
 

I have crazy astigmatism and it’s not something I’ve noticed to be honest. Just done a check with and without the specs on. Been speccy since I was six so maybe it’s something I’m used to. I’d definitely be checking with the optometrist though.

 
Posted : 24/02/2020 8:00 pm
Posts: 7021
Free Member
 

It will settle down; when my prescription has changed the new ones are a little disorienting but not for long.

 
Posted : 24/02/2020 8:04 pm
 aP
Posts: 681
Free Member
 

Yes things will move. You will pretty much get used to it.
Have fun when you see how red and blue lights close together react when you turn your head.

 
Posted : 24/02/2020 8:06 pm
Posts: 14611
Free Member
 

Will take a few days to get used to it.

Even now when my prescription inevitably gets a tiny bit stronger, there's an adjustment period.

Going from no glasses to glasses imagine is more of a jolt.. It's pretty normal.

 
Posted : 24/02/2020 8:13 pm
Posts: 2238
Free Member
 

Just so I'm clear what you're describing.  You're picking a fixed object (like say a cup of tea on your desk) and then rotating your head whilst looking at the object?  Is it the object that moves or other stuff around it?

I don't think I see that but I've worn glasses for 25? years and so I suspect my brain is compensating.  I certainly do find a bit of focus change etc when moving from contacts to glasses and vice versa.

 
Posted : 24/02/2020 8:14 pm
Posts: 90742
Free Member
 

I think you're describing spherical aberration, this is normal IME. I switch between contacts and glasses, if I've been wearing glasses for a few days then go to contacts and attempt to go down the stairs I have to stop because they look much steeper and longer. The glasses make them look closer cos they're at the bottom of my vision.

 
Posted : 24/02/2020 8:18 pm
Posts: 14611
Free Member
 

Is that like a slight fish eye effect, like if you set the F.O.V to high on a pc game? That's kinda what I get but your brain quickly adapts.

 
Posted : 24/02/2020 8:34 pm
Posts: 76786
Free Member
Topic starter
 

Just so I’m clear what you’re describing. You’re picking a fixed object (like say a cup of tea on your desk) and then rotating your head whilst looking at the object? Is it the object that moves or other stuff around it?

Yes. Everything, it's like the aspect ratio changes.

 
Posted : 24/02/2020 9:20 pm
Posts: 0
Free Member
 

It is normal. You will soon learn to move your head rather than your eyes to look at things. Subconscious skill.

🙂

 
Posted : 24/02/2020 9:35 pm
 aP
Posts: 681
Free Member
 

Try having 1.8 index lenses with a -12 prescription. I've not seen a straight line for about 30 years.

 
Posted : 24/02/2020 9:45 pm
Posts: 14611
Free Member
 

What prescription do you have cougar?
They should have given you a card or a printout with a bunch of numbers on it.

It does just sound like your brain needs to acclimatise to the lenses.

 
Posted : 24/02/2020 9:54 pm
Posts: 76786
Free Member
Topic starter
 

I think I've found the problem. It's to do with the distance the lens is away from my eye. If I close one eye and twist the other lens to be roughly parallel with my (curved) face rather than flat the problem goes away. It's like the lenses are for wrap-around glasses rather than fairly straight ones.

What prescription do you have cougar?

I don't have it immediately to hand. Nothing above 1.0 in any of the columns.

 
Posted : 24/02/2020 10:48 pm
Posts: 76786
Free Member
Topic starter
 
    SPH    CYL   Axis  Near-ADD
R  -0.75  -1.00  100  +1.25
L  -0.75  -0.50  75   +1.25
 
Posted : 24/02/2020 10:52 pm
Posts: 17645
Full Member
 

That looks like bifocal or varifocal prescription (different "near" figures).

 
Posted : 24/02/2020 11:29 pm
Posts: 76786
Free Member
Topic starter
 

Eh, well it's not. Or at least, my specs aren't.

FWIW, wearing the glasses I can't see 'near' very well. Car dashboard is out of focus. Without them my reading distance is perfect vision.

 
Posted : 24/02/2020 11:34 pm
Posts: 17645
Full Member
 

OK the fact that you can't read the dashboard suggests you are wearing single vision glasses which correct your distance vision. However, that NEAR ADD shows you require different correction for near vision (reading glasses). If you had a strong prescription like mine (-10ish) then you would certainly require bi or varifocals. I have varifocals for general use but the inserts in my cycling glasses are single vision and I have the same issue as you - reading the computer on the bars isn't brilliant. However since your prescription is mild I would expect you may get used to the difference between distant and near - your brain will compensate.

If I'm wrong and you don't get used to it in a few days I think you should go back to the optician.

 
Posted : 25/02/2020 4:10 pm