trouble shooting for PAL
Hi all,
My patient , 45, computer user ordered a essilor natural PAL lenses.
Rx:
+0.25
+0.50
add +2.5
fitting high 19
COF plastic frame
first time to wear PAL
when picking up, she complained that
(1) she has trouble to see computer screen clear and her eyes very strain to focus on computer
(2)when reading, she only can see middle part of the sheet but both right and left parts are blurred.
I checked the lenses and PD no problem
Could anyone help me?
thx
James
Simple solution
Take them out of the PAL and put them in a task specific lens like the Nikon Office, Sola Access, or Essilor Interview.
The client does not need glasses for distance. The task specific lens will allow the person to use the lenses for intermediate and reading.
You could also keep her in an Essilor Natural and use half the add added to her distance and use a +1.25 add. Since she has never worn progressives you could fit her in a FT-28.
Jeff
Originally Posted by For-Life
I second that.
Put her full NV Rx is a trial frame an establish her depth of field.
Let me know
Barry
Jamesye,
she age 45 WITH ADD250 ?
If she is ok, in my experience may be the hyperope is not enough, therefore the add will be much higher than normal.
However if she really need that reading power, when add increase the field of vision esp. computer segment will be bad.
only way to solve is using office PAL.
:idea:
To achieve a "soft design" lens Essilor spread the destortion well into the distance. For rxs with weaker spheres and no cylinder sometimes are a problem. Put her in an XL of VIP. Super no line if you want to stay with Essilor.
45 year and have add 2.5 D. NOT make sense.
1. May be over minus or under minus for distance prescribtion
2. The patient may have latent hyperopia
3. May have working distance at 30 cm. if true this case will have
problem in intermediate distance with PALs.
4. The patient may have accommodate problem
IF need PALs you will used PALs with 15 or 17 mm. corridor
and will better if used free form PALs.
OR used hard design PALs with long corridor IF it have in your market.
Not used 11 or 13 mm. corridor or short corridor PALs.
Pseudophakia? If not, then I would strongly recommend calling the doctor to confirm and justify the Rx'd Add power.
Science is a way of trying not to fool yourself. - Richard P. Feynman
Experience is the hardest teacher. She gives the test before the lesson.
Shamir do a lens called the 'autograph-office' as an access lens. Too soft a design for my liking but if you were looking outside of Essilor for a soft design, peripheral distortion was never a problem for me!
Last edited by RetroRat; 06-15-2010 at 05:34 AM. Reason: Correcting poor spelling
PPPPSSSSTTTT!...Hey RR...the peripheral distortion may be causing you not to take in the full text. This thread is from the Zeros...we are in a new decade.
Yay Shamir! Good lens, eh. Let's go have a beer, eh.
It's been nearly 3 years, let's hope the issue has been resolved.
To Shamir! *swig* lol
Wait...... the OP doesn't understand that there is peripherial distortion in progressives?
:drop:
There are rules. Knowing those are easy. There are exceptions to the rules. Knowing those are easy. Knowing when to use them is slightly less easy. There are exceptions to the exceptions. Knowing those is a little more tricky, and know when to use those is even more so. Our industry is FULL of all of the above.
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