TOT: Mam Tor

Jun 30, 2018 78 Replies

I need weak distance glasses for driving (improves lettering on signs, but otherwise distance sight is pretty good) and much stronger reading glasses (as I've got older, my eyes can no longer accommodate to focus close up).

I was offered varifocals, but I found the geometric distortion, which varied as I turned my head, impossible to live with. Three different grades of lens were on offer; I went for the middle of the three. If an object passed my field of view while I was looking straight ahead, it would be tilted one way on the left of my vision, become vertical at the centre of my vision and then tilt the other way on the right of my vision. Rectangles and circles became parallelograms or ovals. The optician checked the centres of my eyes versus the lenses and found a slight error on one lens, so another set of glasses was made up, but they were just as bad. I certainly couldn't have driven in them. Even walking around made me dizzy. And I tried them for a couple of weeks to let my eyes get used to them.

The optician said that he'd never heard of anyone else reporting what I was seeing. He offered me the more expensive lenses but couldn't guarantee that the effect wouldn't be there, even if to a lesser extent. So I went for the back-up plan that they offered: two separate pairs of single-vision glasses (one for distance, one for reading) at the same price as the varifocals. Slightly inconvenient to have to carry around two pairs of glasses, but at least there's no geometric distortion.

When I first used varifocals, newspaper text seem to be in a curve upwards at the edges of vision. Butm they were so useful that I perservered with them. My brain now compensates and tehn lines look straight.

Mo too

I did much the same with my latest pair and am really pleased with them, well worth the extra money.

Mine are OK for driving, but for long periods, especially at night where it is more critical, I find that it can be uncomfortable having to bend my neck to ensure I peer through the top section, and have a distance pair to hand.

I also use these to get a full field of view at the theatre, or in a setting where I may need to lift my head to look over people.

I have an intermediate pair for my twin-screen computer setup, and they came in very handy when decorating, as I could see to fill cracks in the ceiling.

Chris

Same here. I used to manage with the right eye for distance vision (could have done with weak glasses even then) and the left eye for vision only inside the car.

With the left eye gone, it was hard to see the instruments!

I now have very large lensed bifocals, with the division arranged so that it's just above the dashboard. Works really well.

+1

And well worth asking for the "intermediate" prescription: it is not automatically provided. I _think_ it's not even required as part of an NHS examination, although I've never had an optometrist refuse to give it when asked.

Two fishbowls stuck to the bottom part of the field of view.

Anything between days to a few months, and the brain adjusts, and you don't see it anymore.

Thomas Prufer

The advice I got, and which works for me, was to point my nose at what I was looking at. It soon becomes automatic, though beware of walking into things if you're concentrating on ground conditions in difficult terrain!

There are varifocals and varifocals: the cheaper ones have a narrower field of vision.

I noticed that at first but soon got used to it. It's not an issue now.

Before I got varifocals I had bifocals with the lower area set for reading and the upper for computer. Seriously useful.

I've had varifocals for 30 years too, only starting to have difficulties recently because my prescription is changing very rapidly at the minute (is obsolete after six months).

While I agree about the nose pointing, that's less easy when at a give way sign where the road joins the larger road at an angle. To point my nose to look for traffic from the right at that junction requires turning my head by 120deg - not so easy. That's where one needs the peripheral vision.

So if you had to tilt your head back to focus on infinity presumably the area of lens near the top was such that it focused beyond infinity?

Bill

Yes I have a pair like that.

Bill

That's OK in a car - I have a pair of bifocals for screen and keboard/paperwork, so somewhat similar. In these examples, the horizontal line is fairly predictable (bit more variable for desk/PC use). I considered a pair of bifocals for walkin/reading, but even with just distance glasses I can't really look down enough for stairs; I'm better without the glasses then, so rough going would be rather fraught with bifocals.

And thus discovered Buzz Lightyear.

Oh but the temptation to try them on when I get back from work and find the postman has delivered them will be strong.

Point noted;-)

I paid £££ for the lenses with the widest field of view.

Delivered by post? Better to be in the optician's so they can fit the frame to your prescription.

I made a mistake with my first pair by choosing a frame that took fairly small lenses and I had a lot of problems with peripheral vision.

Since then, I've always chosen a frame that takes large lenses and pay the extra for SpecSavers superior lenses (which isn't a lot, as I recall).

Since then I've had no problems.

What's your distance eyesight like?

Since having cataracts removed from both eyes, I no longer need glasses for dirance vision for the first time since I was

14, but opted for the varifocals because I was used to wearing glasses all the time and the middle range part gives me excellent vision for using the computer plus, of course, I never have the problem of knowing where I last left my glasses!

I still have some residual astigmatism but, if your distance vision isn't too bad, you are welcome to try mine out the next time you come down.

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