Search:

Yup, quite common for the highest Sph listed on the Rx availability range to represent the maximum combined power (Sph + Cyl).

Although there's no law saying so, it's probably safer to presume so...

Lots to unpack and understand here (for me, at least), hope you don't mind the further inquiries :)



Ok, noted.



Be that as it may, how does this design functionally differ from a...

I concur with DanLiv, as from my experience fitting both Essilor and Zeiss, Zeiss lenses overall seem more inclined towards 20/20 vision whereas Essilor lenses tend more towards 20/Happy. Both in...

What was the previous Rx?

Also, what Lensman said about the difference between prism obtained by grinding vs decentration.

Although having said that, I wonder if all else is equal, that using...

Actually, considering that this topic is being debated here (therefore proving that even eye care professionals keen to learn such things don't always know it)... ��

From there I could imagine the...

I believe any progressive that can be ordered with a progression length of 22 mm would be significantly softer than whatever it is most patients dread about progressives. Haven't ordered a corridor...

Have a former optometry lecturer who dispenses these regularly, she swears by them as being noticeably more consistent than progressives for myopia control (and she's meticulous to a fault in her...

To update:

Thanks for the feedback, after having sourced folks who used those, sampled a colleague's Welch-Allyn and another's Keeler, felt both were about the same.

It came down to price,...

Correct. 0.33 mm per prism dioptre, away from the prism base.

The post linked earlier has a detailed explanation by Daryl Meister, and System of Ophthalmic Dispensing has likewise :)

If she consistently purchases stuff from your practice over many years, what Barry said.

If she's a one-time deal from five years ago, what Krystle and drk said.

Sometimes it's best to let them...

Seconding the suggestion to use contact lenses for the required distance prescription, but perhaps with a progressive set to distance Plano, Add +1.00 worn over the contact lenses for relief from the...

Local context here (Malaysia, Southeast Asia), is usually that walk in patients are always welcomed. Of course, if someone else is already occupying all available staff, they are often politely told...

This was my understanding of it as well, yes.

As Robert (S, not M) has mentioned, during blocking, the view of the blocker mires through the lenses are displaced by the prismatic Rx, and so we...

Old but gold, a thread about this particular type of compensation, with input from the late (and great) Daryl Meister:

Fitting PALs with prescribed prism

TLDR: compensate the centration by 0.3...

I find it more helpful to think in terms of intermediate addition in 0.25 DS increments first, then their corresponding distances. As drk has noted, it gets the job done :)

In terms of how much...

I often dispense all forms of blue cut lenses (coatings, in-mass, and indirectly via photochromics) to patients, with the following caveats:

- I do not make any claims about the alleged health...

Essilor (via Bernard Maitenaz) may have designed the first commercially viable PAL, but Dr Estelle Glancy may have prior to that been the true designer of the first PAL.

Varilux Comfort (including...

Solid advice already given on the lens correction options and how to go about that.

Having dealt with similar patients since these sorts of implants became popular (almost all of which eventually...

Agreed on the hyperopes favouring soft design bit, that's been true across the board for all manufacturers and designs.

Regarding the CL wearers thing, doesn't seem like a price point factor......

So, my trusty old Heine streak retinoscope has died after 10ish years of use. Got it at a decent price back then by sharing a group purchase with a group of optometry students, but current prices are...

Sounds like a plan, and if all else fails, maybe reconfirm the axis changes (since she's after all a keratoconus patient) :)

Personally, for all higher minus cases passing through my dispense, if...

IIRC, prior to free form designs, when it was all molded front surface progressives, then the location of the PRP was more relevant for various reasons, including pantoscopic tilt calculations etc as...

So, my Zeiss rep visited, polite as always, and due to some recent increased turnaround times for edging jobs by my usual Essilor/Hoya labs, I'm taking a second look at the Zeiss progressive lens...

Also, just noticed something that may be related:

Am unfamiliar with this particular variant of Varilux Physio (since locally here it's just the default Varilux Physio and the Varilux Physio Fit...

Unsure about how the Rx compensation on this particular Varilux Physio design is done, is it possible the sizable axis changes could have led to this patient feedback?

Also, given the high Rx, any...