Search:

I received lenses with smear on the segment region. Are there any ways to solve this if we are using the dip coat process for hard coating.

We are encountering smearing problems with ST28 + Lenticular during the HC process (Dip Coat).

Any idea how to solve this issue. Would changing to Spin Coat solve everything or it may arise other...

Dear All,

I encountered on a website (laramyk)

They spoke about adjusting various functions on various types of edging machines to reduce hydrophobic lens slippage.

How valid and relevant...

How do you polish these trivex lenses?

What could we suggest to the supplier on addressing this problem?

Hi Everybody,

It seems to me that we always receive uneven polishing for trivex material from our supplier for rimlon or rimless edging.

The finishing of the lenses always has pits and wheel...

Hi Experts,

Do anybody have some idea where to look for different grades of generic lens material information ie technical names compositions. for example, MR7,8,9,10.

Warm regards

Hi everyone,

We have differences with various brands of progressive lenses where we have different MRP/PRP from the distance fitting point.

Are there any significances of a higher, lower or...

Are there differences between these 2 ophthalmic lens designs ?

1) Some claimed that DA is merely a thinner lens with dual edge thinning methods at a single meridian whereas Atoral design is a...

Would there be such a calculation programme existent ?

It would be real fabulous if someone has that to share!!!

Hi guys,

Would anyone be able to know whether could we induce prism by decentration in astigmatic powers or it might be better to do a grind in prism for astigmatic powers.

Are there...

I heard we are coming out Transitions Vi coming next year and Transitions NG is going to be eradicated.

Out of curosity, what are the differences between TNG and T V compared to previous I, II or...

I have seen beautiful descriptions of lens report whenever i send in a defective lenses to my supplier.

Would there be any formats of such letters or are there common used explanations for...

xx

How relevant are contour and power plots relevant today's assessment of free-form atoral progressive lenses...

Free form atoral designs takes into account of oblique astigmatism and incorporates...

In Singapore, cosmetic appearance of one's eyeglasses is far more important than the features which the lenses provide.

People would complain about the yellowish tint that makes up the bulk of the...

Maximum Path difference.

I have read in the manufacturing of polycarbonate VCDs that there is a erm called measurement of path differences in polycarbonate material.

It would translate to...

Hi folks,

I have read somewhere in the thread @ optiboard about triple aspherical design in progressive lenses.

Im fascinated by this term triple aspheric.

In my dictionary of optics, i...

Hi guys,

Do any of you have links to provide examples on lens scratches or crazings or videos on any of the above to share?

That would be great help to me and others....

I have a consumer who comes in to complain that her multi-coat on her 2 month old lenses have peeled. She undertake that it was a manufacturing problem with the coating.

On verification, i found...

Bi aspheric lenses are lenses that works a more detailed function of aspheric lenses.

Aspheric lenses has 2 main advantages.

1. Reduction of lens mass by flatting the lens curvatures. With a...

Birefringence is a term depicting double refraction of light through a lens material.

In lenses, thats very common in certain manufactoring techniques of heat casting which increase the stress...

I have read somewhere that emi coatings have a another feature of neutralising charges close to the lens surface thereby repelling dust at the same time. When the charges on the lens martix is fully...

Hi all,

What are ophthalmic factors that could affect the central image quality of our ophthalmic lenses?

Maybe
1. Abbe Value
2. lens thickness ??
3. base curve ??
4. Material ??
5....

Hi guys,

I understand that Abbe Value one of many differential factors of determining choices of lenses.

Recently, I got to know that Abbe value of our human eye is 45.

1.How is the...