Need help with Access lens

[Sphinxsmith]

I'll fit the frame and make sure the pupil falls with in 5mm of half the B measure. I'll use that as my fitting height; e.g. B measure is 34mm and the pupil sits at 19mm so I order with a 17mm fitting height. Seems odd but an old-timer showed this to me and it's worked great, consistently! I'll also take into account working distances and age to estimate accommodative (sp) ability. If the pt is over 50 we almost always go for the High Add unless focal distances are off the average. Hope this helps.

CS

[drk]

Actual prescription of patient


R/E +0.75 / -2.00 180
L/E +0.75 / -1.75 170

Doctor prescribed For Access Lenses

-0.25 / -1.50 * 180 add +0.75
-0.25 / -1.75 * 170 add +0.75

Now i am confused Which Prescription should i give to the Lab tech. me also confused help me,,,

OD +0.50-1.50x180 (assuming this is minus cylinder notation?)
OS +0.50-1.75x170
Ask for Sola Access -0.75 (low degression)
Supply the near p.d.

[Farhan Hassan]

These task-specific lenses cause a bit of confusion. At one time, each would reccomend doing something different for ordering which enhanced the confusion. My reccomendation is this - order the lenses with the full Dr.'s Rx like you would any other lens. Then make this explicitly clear to the lab - they understand all the differences between the different makes. These lenses work from the full reading Rx at the bottom of the lens and then "digress" ( think minus power going up the lens instead of add power which is plus power going down the lens). So on an Access lens you get full reading power on the bottom and either -.75 or -1.25 in a power change going up on the lens. Gotta think bottom-up. Hope it helps.

Thanks Jason , i was exactly thinking the same...

[maid52]

When you start with the TOTAL reading power, and then subtract either .75 or 1.25 to get the intermediate power on the top what is left on the bottom?
example RX +2.00 Add +2.00

[ml43]

When you start with the TOTAL reading power, and then subtract either .75 or 1.25 to get the intermediate power on the top what is left on the bottom?
example RX +2.00 Add +2.00

regardless of the regression(low or high)

the bottom is always the full add(distance + add)

[drk]

Remember, these lenses came in with the dinosaurs. Don't think of them as computer lenses, think of them as "SVNO with benefits".

[Sphinxsmith]

Still use them often with great success! K.I.S.S!

cs

[maid52]

regardless of the regression(low or high)

the bottom is always the full add(distance + add)

that changes the total power

[EyeCare Rich]

In your example of +2.00 Add +2.00 the bottom of the lens will be +4.00. As you move up the lens it will lessen in magnification by whichever version you order.

[Tallboy]

that changes the total power

no it doesn't I think you are confused by what ml43 is saying. Top would be say... distance + 40% of the add and the bottom would be distance plus the full add.

[ThePinkRanger]

Thanks for keeping this 14 year old thread around! Makes me hate doing access lenses a teensy bit less.

[LENNY]

I t will read higher then the total original RX at the very bottom! This is why patients easily wear them for 2-3 years...

[Tallboy]

I t will read higher then the total original RX at the very bottom! This is why patients easily wear them for 2-3 years...

Was this a side effect of SOLA's design?

[lensmanmd]

We moved all of our computer PALs to the IOT Workspace. Easier on the opticians, better choices for the patients, and lower COGs for us, even taking the diamond and engraver costs into account.

[Tallboy]

We moved all of our computer PALs to the IOT Workspace. Easier on the opticians, better choices for the patients, and lower COGs for us, even taking the diamond and engraver costs into account.

Don't give away all the crabland secrets!

[lensmanmd]

Don't give away all the crabland secrets!

Ha!

[LENNY]

Was this a side effect of SOLA's design?

probably not, but Daryl is not here to answer this...:(