Computer Lenses?

[AdmiralKnight]

Sure you can tell what the reading is, and that'd be fine if they were reading glasses. They're not though. Maybe I'd trust them more if I understood, or even KNEW the formula they use to figure out the intermediate portion, but I don't. I don't like having that many unknowns when it comes to what I dispense.

[THE MEB]

we started off with sola/zeiss rd's for computer lens, but we have found that the office and access work better, and you don't have to have minumum 24 seg hieght, like on rd. Also, the designs of the office and access are much simpler, and subsequently more effective more often than the rd.

[chip anderson]

Admiral: Formula: 1/2 the add power works fine every time.

[AdmiralKnight]

Then every single office lens I've used has been wrong, because that's not what we get. That's my problem with them. The reading will be fine, but If I check the intermediate portion the same way I would as if I made them (half the add, added to the distance) It's not the same. I've seen them off by three quarters of a Diopter! No thanks.

[THE MEB]

like they said previously, the only way you can properly check an office lens is by checking the total reading power at the bottom of the lens. everywhere else on the lens there is no exact formula to check the proper power. Office is not alone in that regard, there are several, including the sola access that is the same as far as checking power is concerned.

[AdmiralKnight]

That's my point. There should be no reason you can't check the intermediate power. As far as I know, half the add, added onto the distance is pretty much the norm when making intermediate specs. And more often than not, this is the area people are going to be looking through the most, so why can't you check the power? Why is every single lens using a different formula? I don't like trusting the companies to the point where I'll just assume they're right.

[Robert Martellaro]

That's my point. There should be no reason you can't check the intermediate power. As far as I know, half the add, added onto the distance is pretty much the norm when making intermediate specs.

Closer to 60% for the average desktop monitor distance.

And more often than not, this is the area people are going to be looking through the most, so why can't you check the power? Why is every single lens using a different formula?

There's no formula per se, but they do specify the degression/power shift (the power shift is close to or equal to the Add power in some designs). The problem here is that the power shift is over the entire vertical field, or Xmm above and below the pupil, and as you have stated, there is no way to know what the power will be where it's most important- when looking at the monitor.

[NOVUS2]

I've used sola access for years and haven't had any complaints.
Only disadvantages over a lined bifocal are the minimum fit ht (15), and only 2 add's are available .75 and 1.25

I've tried gradal rd but seem to have problems with getting an accurate rx from the lab??

[Christosfer]

I have had to do some searching on several occassions in regards to computer lenses. I have done well with access and office.

Access has done well. Continuum seems to be the aspheric eqivalent.
Office will give a little more range.
RD is better for someone who needs to see across the conference table.

[KStraker]

You can used ... every brand of same product type.

If you understand ...

1. your customer need

2. your product
2.1 degression of power ... for each product
2.2 minimum fitting high ... for each product
2.3 Power range ... for each product

I agree 100%. We use Concord Desktop.

Standard formula for surfacing should be:1. Use bifocal from standard Rx to choose appropriate degression. 2. Add sphere power to bifocal power to find total near power. 3. Subtract the degression from the total near power. 4. Surface this power as you would a sv lens. (the lens design does the rest)

If I'm wrong,I'm sure someone will chime in.

[Bobie]

Hi, everyone
After I have been fitting more than 500 pairs of Impression 80 , I dare to said that , if your customer ever try Individual Free Form Super Computer Lenses like Rodenstock Impression 80 , they will not like any other computer lenses anymore.

The only one weak point of Impression 80 is available only in CR-39.

I have a lot of customers who would like to pay 3,500 US$ for Impression 80 in index of 1.76.

[Bill Mahnke]

No modified prescriptions...

That's one of the nice things about the (HOYA) TACT. It's available in 9 add powers (+1.00 to +3.00), so you get the power you want.

[Bobie]

Impression 40 and Impression 80 is a individual free form of 40,000 million designs occupational PALs that design by addition 0.25D step from ADD 1.25D up to ADD 3.00D and design by corneal vertex distance 0.01D step.

Hoyalux TACT are semi-finish occupational PALs that have only one design and the widest zone of TACT is even narrow than the narrowest of Impression 40 and 80.

The happy TACT wearer will be very happy on Impression 40 and Impression 80 , but Impression 40 / 80 wearer are unhappy with TACT.

Advance Progressive Addition Lenses Club has been testing with many thousands of wearer on trial frames and we have more than 100 different design trial sets of PALs and Occupational PALs that one wearer can test 100 different designs of PALs and Occupational PALs in their own prescription to compare page by page , second by second , screen by screen.

For professional dispensing optician or OD who would like to learn how to set up trail PALs , we will charge 5,000 US$ per day.


From :

The optics of occupational progressive lenses
James E. Sheedy, O.D., Ph.D. and Raymond F. Hardy, B.S.

[MarySue]

I have heard alot about Shamir - that's a Younger lens is it not? I don't think it's available here in New Zealand, however I'd love to look at the specifications of the lens.

I currently use the Hoya ID Cliard, Rodenstock Impression series, and the occassional Nikon Webb when required.

I find that the key in working with an occupational is to sell it to the client in it's true form, and not try to give distance vision by manipulating the shift or add powers.

Perfect world - Progs, Occupationals, and RX Sunnies - contacts for the weekend, and hey - throw in a back up of each!

:cheers:

My office uses the Shamir Office with great success! I even use a blended 28 for some patients and they have reported that it works well also...just dont forget the panto!

[au]

Hi Marysue, check this up,

http://www.shamirlens.com/

hope this help !

:cheers:

[chip anderson]

Are computers know'd to emit any form of radiation that UV would protect against? Or was the good doctor just trying to make another 20 bucks when he checked UV on an Rx for a pair of SV computer lenses?

Chip

[MarySue]

Thanks - I've sent them an email to see if they sell in New Zealand (can't really see where they do, but someone may have a relationship with the company here.

[Laurie]

Hello,

I am in communication with the people at Shamir as an education consultant...while I am not involved with their day-to-day activities, I will also forward the post to their headquarters in San Diego.

: )

Laurie

[Caree]

I am a natural mono vision,go figure. My ONLY vision need is my computer distance. I have a 19" LCD about 30" away. I LOVE my Business 10. I can see all my insurance notes along my countertop edge and look over them for outside the window. It is comfortable walking around indoors,as in I don't feel I'm blind,just a little blurry. I have remade Shamir Office wearers into this lens,and they all feel the entire top is clear,not aware of any "corridor" and swear it is a SV lens that they can see 36"-12" with, which we all know, ain't so. 'Tis my lens of choice, I only wish there were more DP's to choose from like the Office lens.

[Bobie]

LENSES DESIGNED FOR VDU/OFFICE USE

Peter Sanders examines the variety of dispensing roles for these lenses.
From : http://www.abdo.org.uk/pdfs/CET%2010.pdf
Download PDF : lenses_designed_for_VDU-Office_use.pdf ( 90 KB )

[au]

Bobie, good post, we are doing the right jobs, to make people feel easier and happier in their life !

:cheers:

[adirondackeye]

We use the Nikon Online, no problems.

[THE MEB]

has anyone used the Zeiss Business lens. a patient who lives 3 hours away has the gradal rd. he is convinced the opthamologist told him he needed a zeiss lens. We have a zeiss chart that shows the usable area of different lenses ie: progressives, gradal rd, zeiss business, and ft28. Anyway, the chart indicates the Business lens has a much wider channel of usable vision than the gradal rd. Is this the case? He has a +3.00 add with a sphere stength of +.75 which means if he goes with the Business lens he would need to go with the business 15 instead of the 10.

[Bobie]

• The world best hi-end individual free form computer lenses for SPH. + 0.75D ADD 3.00D = Impression 80 at retail price 800 US$
• The world thinest hi-end free form computer lenses for SPH. + 0.75D ADD 3.00D = TOKAI BS LARGO Type 1 plastic 1.71 ABBE 34 at retail price 1,400 US$ per pair.
• I am waiting for Impression 80 plastic 1.71 at retail price 2,200 US$ per pair.

:bbg:

[THE MEB]

that all sounds very impressive, but it's not going to help me any. I need to find out about the zeiss business lens, thank you.