Q: Can A Supplier Quote Eye Talk Recommended Prices?
The recommended retail prices (SRP’s) in the Eye Talk Reference Guide help practitioners to understand how different products compare in wholesale cost and retail price point. This can be very useful for a supplier to quote in advertising and publications - particularly when it is for a new product. Is this allowed?
The information in the Eye Talk Reference Guide is protected by copyright laws and is the intellectual property of Eye Talk Consultants. This information was independently compiled and calculated by Eye Talk and is unique to that business. Disclosure of any part of the listings in the Eye Talk Reference Guide is not allowed without prior permission and would be a violation of the proprietary rights of Eye Talk Consultants. However, permission can be requested and is often given with limitations:
- Eye Talk copyrighted information cannot be reproduced in its entirety
- Permission will not be given for a supplier to produce a listing showing Eye Talk information for all of their products.
- Permission is commonly granted for new products - where the information would otherwise
- Not be available to practitioners until the next issue of the Eye Talk Reference Guide.
- All requests must be in writing and the Eye talk permission will be documented in the same way.
- When permission is granted, Eye Talk must always be clearly acknowledged as the source.
- Granting of permission to reproduce Eye Talk information is never ongoing. Each request is for a special occasion and must be repeated if the publication is to be updated.
Eye Talk Consultants are confident that suppliers will recognise the need and importance for Eye Talk Consultants to protect their copyrighted intellectual property.
The copyright notice is repeated many times and the following notices appear in every issue of the Eye Talk Reference Guide:
Q: Can A Supplier Make Late Changes To Data That They Have Already Supplied?
The biggest challenge to publishing the Eye Talk Reference Guide is the late information we receive from some suppliers; or when we are provided with information that is incorrect. These have become large problems and Eye Talk has been forced to introduce the following policies for the sake of all those suppliers and practitioners who rely upon our publication.
As the producers of the Eye Talk Reference Guide, we strive to publish every issue on time. To date, we have a perfect on-time record for over 30 years and this gives confidence to both the advertisers and the practitioners. Optometrists and dispensers rely upon Eye Talk, so we know that we simply must always publish on time.
- Every issue has an Information Deadline Date for the supply of product information to be included.
- Information provided before the Deadline Date is included in the Eye Talk Reference Guide at no charge.
- Information provided after the Deadline Date cannot normally be included. While late changes cannot be promised, if we are able to make a change to the printing less after this date, the changes will be invoiced at $15.00 (plus GST) per product affected.
- On some occasions, the information provided to us is incorrect. Eye Talk makes the requested changes at no charge, but then another representative of the supplier advises different information for the same products.
- The information provided to Eye Talk is included or changed in the Eye Talk Reference Guide once per issue at no charge.
- If the information or changes were incorrect and the typesetting and layout then needs to be repeated a second time through no fault of Eye Talk, these changes will be invoiced at $15.00 (plus GST) per product affected.
With such a wide variety of products it's in everybody’s interest that information in Eye Talk is on time and correct. Thank you for your understanding and cooperation.
Q: How Can I Calculate The Refractive Index Of A Lens?
Sometimes it would be helpful to know the refractive index of a lens that is being worn by a patient. Perhaps when a lens has been broken and needs to be replaced in an index that will match the other eye? We can’t directly measure the refractive index and identify the material, but there are things that we can measure and these can be used to calculate the index.
A: Measure the lens power and the front & back curvatures.
Using a Vertometer (Focimeter) measure the lens power. Then use a Geneva Lens Clock (Lens Measure) to measure the front and back curvatures. The formula for the material refractive index is then as follows . . .
nt = Ft (nm -1) + 1 F1 + F2
nt = True Refractive Index
nm = Calibration Index of the Lens Clock
(see instrument face - usually 1.530 or 1.523) Ft = Lens Back Vertex Power
F1 = Front Curve (within 0.12D - usually positive)
F2 = Back Curve (within 0.12D - usually negative)
Lens power is measured as +3.00D and the curves are +6.00D and -3.37D, as measured with a 1.523
lens Clock. The calculation is then as follows . . .
nt = (3 x (1.523 - 1) / (6 - 3.37)) + 1 = (3 x 0.523 / 2.63) + 1
= (1.569 / 2.63) +1
= 0.597 + 1
= 1.597 (rounds to 1.60)
NOTE: Results will vary if the lens surface is aspheric or if the measurements of curvature or power
Q: Why Does Eye Talk Abbreviate The Names Of Some Products?
The names of some lenses are not the identical to those used by the supplier, or they have been abbreviated. Why has this been done and is there a consistent system for doing this in the Eye Talk Reference Guide?
The Eye Talk Reference Guide does not have an unlimited amount of space available to list each product, so there is a limit of up to two lines in the publication for each spectacle lens product.
As well as being necessary for the Eye Talk Reference Guide, this is also a necessity for when the same information is imported into practice management software (PMS) like Optomate and Sunix. Otherwise the information simply does not fit into the fields available and practices make mistakes because they cannot see the complete information, or print it on lens orders.
For ease of use, Eye Talk has also adopted a standard sequence for the product names, material and coatings. This makes it easier for practices to find what they are seeking and also keeps all of the options arranged in a familiar and logical way that readers can become accustomed to working with:
- Company Name
- Index is only included in the description if the product is offered in more than one index (Index is always displayed in the “Index” column)
- Hard coating (HC) is only included in the description on if the product is ordered with more than one hard coating option – for example, front and double surface coatings. (Hard Coating is always displayed under the “Features” heading).
- Anti -reflection coating (MC) is always included in the description on if the product is only available with the multi-coat as a standard inclusion. Additional listings appear when the product is offered with more than one multi-coating option. (multi-coating is also displayed under the “Features” heading).
- Diameter is only included in the description if the product is offered is offered in more than one diameter.(Diameter is always displayed under the “Diameter” heading).
Essilor Azio 1.60 Transitions Grey Crizal A2 76
Company Name Product Index Treatment Coating Diameter