Questions to Hoyalog users.

[Leyend]

To order Hoyalux ID/FD by Hoyalog.

1 Ordering Conventional PALs or Free-form by Hoyalog (Mets, either cut or uncut), does the programme itself compensate the prism imbalance incase of a big different power in both lenses?

2 Hoyalux ID / FD ( ID Lifestyle )There are some specifications : XF, XB , XW. Does anyone know how to add these specifications and how different from ordering without adding.

3 Can we put Inset Value for FD.? and if we can what is min-max value.

4 What is the benefit when we specify working distance for near vision (XD)

Thanks.

[Memoir]

Hi Leyend,

To answer some of your questions,

XF is the Front surface addition power
XB is the Back surface addition power
XW is the Addition power for the as-worn position

Optometrists/Doctors can check the "Add" in three ways. This is done by adding lens onto a trial frame, either in front of the trial frame, or on the back, or using the phoropter head (known as the 'worn position' and said not to be very accurate).

(*hint* Power changes due to varying Back Vertex Distances!)

The Hoya ID can use these parameters and optimize the lens design accordingly.

The most common method is placing the add power lens on the front (of the trial frame). So if no instruction is specified, it will default to the Front surface addition power.

Yes, you can order a specific inset for the Hoya ID and FD. They range from 0mm to 6mm.

The Hoya ID can use specific working distances between 30cm and 50cm.

The Optometrist/Doctor still has their role to play, as to working out the Addition power based upon their lifestyle needs (eg, "Bob" with an Add +2.00 likes to hold his newspaper on his lap and has a working distance of 50cm.)

To explain, compare two lenses, two Hoya IDs, one ordered with a working distance of 40cm, and the other with the working distance nominated at 50cm.

The ID can use the specified working distance (so the best lens in this example for "Bob" is the 50cm) and create a lens designed for that working distance. ie, the wearer will experience clearer vision in the near zones, when compared to the other ID lens ordered with working distance of 40cm.

You will probably find that conventional lenses and most other free-form design progressives base their designs on a working distance of 40cm (like they do with other parameters such as BVD, Pantoscopic tilt, Facial Wrap etc, they will simply take an average or find what is most commonly out there, and choose them as the basis of their design).

If no working distance is specified, it will default the working distance to 40cm.

So the idea behind the Hoya ID (and partly the FD) is by nominating these parameters is to create a customized lens for each wearer, based on their prescription and everything mentioned above, which will give them the best vision (clearness, comfort etc) and in all directions.

As far as your first question, I don't know! Perhaps someone else has that insight! Or speak to your local lens rep!

Regards,
-Memoir

[Leyend]

Thanks Memoir,
No one from Hoya's Technical Support could give me such great information you did.

What about Prism Imbalance?
As far as I know, they correct the imbalance in Gradal Ind.
How about ID/FD?

[Memoir]

Hey Leyend,

As far as vertical prism imbalances:

I do not know whether the ID or FD automatically corrects this, or even the instructions to do so.

I will have to get back to you about this when I have an accurate answer!

In the meantime, have a read up on slab off bifocals (and progressives) - if you haven't already - there might be some more clues hidden in the threads of optiboard on this topic!


regards,
-Memoir

[Memoir]

Dear Leyend,

I can say that the Hoya ID and FD are currently not available to correct for vertical prism imbalances by the way of the 'slab-off' method at this time.

However, Hoya GP, Summit Pro, Summit CD and a few bifocal designs ranging across 1.5, 1.6 and 1.67 materials can be produced with slab off from Hoya Germany.

I cannot be sure about any other Hoya lab locations. It may be best to contact your technical specialist in your area for further information!

Best of luck,
-Memoir.

[Carlo]

Hello, I'm looking for the installation files of HOYALOG 6.5 software for my GT-3000 tracer. I changed the workstation last week and I lucky to install the 6.0 version becouse I found old CD-ROM from HOYA. I need to uptdate to the 6.5 version. Let me know if there is some chance to get it from some early user of HOYALOG.
Thankyou,
Carlo