Using a short corridor progressive in a deeper frame

[Happylady]

Does anyone do this, use a short corridor progressive fit 20 high or higher to increase the reading area?

[Sledzinator]

I like to use variable corridor lenses in these situations, best of both worlds.

[Happylady]

A variable corridor lens with be longer if you order it with a 20 or higher fitting height. So it's not really the same thing. Though I have heard of ordering a variable corridor lens with a shorter fitting height to get a shorter corridor length.

[Slim]

I do, had one the other day... 19 or 20 seg. moved him to a gt2 short from a 3d that someone had him in... he was a +250 read and he was smiling ear to ear! the 3dv flat out did NOT work. when I see the higher reads i start to consider shorts

[jefe]

When using backside freeform lenses for hyperopes, I've found it's sometimes necessary to shorten the corridor somewhat. I don't like using variable designs; I use the fixed versions (e.g.: Auto 2 fixed vs. variable).

[uncut]

Does anyone do this, use a short corridor progressive fit 20 high or higher to increase the reading area?

I have....with good results, especially in the same brand that the person is currently using.

The patient is happy to obtain a larger area of their own add, more that minimum.

The exception is.....where intermediate power generosity is required(some short corridor progressives chintz in this area). or where a deficiency in width is detected!

[edKENdance]

Used to do it more when we were doing more Definity lenses in order to max out the ground view.

[DanLiv]

This does not increase reading, it decreases it. Short corridor sacrifice some reading and tons of intermediate. However, it does raise the position of the full add so they don't have to drop their eyes nearly as much. It certainly works for some people, especially those who have been in short corridor before.

[Barry Santini]

As people transition from the fashion of shorter B's to deeper B's, it is important to Not let the corridor/eye-depression angle encounter too much delta. Nobody likes a longer an increase in depression angle, all other things being equal.

B

[drk]

Yes, but less aberration with a longer slide...

[Jubilee]

This is where the corridor lengths do come in handy on the digitals. Being able to find that happy medium to bring up the add a bit higher into the frame, while not going full out short corridor to reduce some of the abberation. As Barry notated, patients don't seem to care for their "sweet spot" to move down more than a couple of mm's in the frame.

I am with Jefe as well. I have a tendency to do more fixed.

[cocoisland58]

I have used a short corridor in a larger B frame successfully for a few patients who use their glasses mainly for computer and desk work. I had a pair made up for myself (GT23D short) in a deeper frame and it works great at my desk since I get into the add quicker. However when I wear them other than for work they bother me.

[SailorEd]

I Always use a short corridor progressive for any seg measurement up to 19. 20 and above, I like to use a corridor length of 12mm but not more. I also use a short corridor for plastic frames that sit close to the face no matter what the seg ht is. Has Always worked for me. I also use free form lenses exclusively. Surmount and Physio DRx mostly.

[SeaU2020]

I find it works well for the new larger frames that tend to rest on the cheeks, and similarly, for people with cute little noses and zyl frames where they just CAN'T get to the bottom comfortably.

[Happylady]

Thanks everyone. This patient had a deeper plastic frame that sat close to her face and she had trouble with the reading. She has a separate pair for computer so I'm not too worried there. Switched her from Definity to Definity Short.