RGP lens size

I was fitted with RGPs yesterday (my first contact lenses).

I noticed that when I'm outdoors, I can clearly notice the edges of my
RGPs. Is this normal? Or are they supposed to cover my whole field of
vision?

 

I actually notice it more in bright light (since I see shimmer off the
edges). Yes, they're noticable notably in one direction - on the outside.

Thanks, I'll see how it goes before my next visit to the optometrist in
two weeks time.

 

Playing off of Mike's point: depending on what you 'see,' this may be
indicative of a fit issue (too much movement).

I always saw the tops of mine. They were riding too low (sloppy fit
for a guy with mucho astigmatism isn't a really happy thing). Change
in the base curve and away ... we ... go ....

Good luck!

 

Mention it to your doc when you go back.
There are some standard sizes and then a lot of
interacting variables. Diameter of the lens will
interact with your lids differently, effect wetting,
O2 to the eye, etc. I'm being fitted as well. The
first set seemed a bit small to the point that
(outdoors in the sunshine especially) it had
the effect of looking through a "viewer" and
at night I was getting some pretty significant
edge effects from light sources to the sides
-- right hand side mirror was particularly bad.

On the second set now and the doc had them
made larger. The effect is much less. So I think
we've nailed the size if we haven't introduced
other problems with it. I gather that with RGPs
you will always be able to see the (outside) edges
in your peripheral vision if you concentrate
on it. I think it's much like the dozens of floaters
that I don't see unless I look for them.

-Quick

 

There is no limitation to size. I regularly fit RGP's that are the
size of soft lenses. With those, there is no translational movement,
and the optic zones can be made quite large.

DrG

 

Depends right? There is the oxygen thing (for more than
just comfort). In my case the larger ones are more comfortable
because with the smaller ones my upper eyelids were just
above and "bumped" over the top edge on blink (thick lenses).
I think that also caused the lid to "grab" the lens for a bit too
much translation on blink and sort of hold on to them for a
slow recovery. The slightly larger ones have the top edge
sitting just under the top lid. More comfortable, less action
on blink and faster recovery. We have yet to see if it has
adversly effected translation on down gaze to get to the
center and bottom segments.

-Quick

 

Yes, well the dk/t is something in the neighborhood of 100, and there
is a fenestration (hole) in the lens. So, I'm thinking that the oxygen
flux is as good or better than many of the soft lenses on the market.

DrG

 

Just came back from the cinema. It's much more distracting in there; a
faint halo floating about!