Contact lens materials supply chain standards

[tf50fm]

Hi all, is anyone aware of the standards that govern the quality of the materials that are used to create the contact lens in our supply chain? I'm not sure if they are the same as pharmaceutical products. Anyone can reference some of the standards used? (not cgmp) How can we be sure that they are no trace chemicals in these materials?

[Chris Ryser]

Start here............................

https://www.allaboutvision.com/conta...-materials.htm

[tf50fm]

Start here............................

https://www.allaboutvision.com/conta...-materials.htm

It does not really state what level of impurities in terms of ppm are acceptable or unacceptable for each step of the manufacturing process for example, whereas for the tightly regulated pharmaceutical sector, at every step of the supply chain, they are monitored extensively.

[Chris Ryser]

FDA Classification of soft contact lenses

Soft contact lenses are one of several types on the U.S. Market approved by the U.S. Food and Drug Administration^[1] for corrective vision eyewear as prescribed by optometrists and ophthalmologists.^[2] The American Optometric Association published a contact lens comparison chart called Advantages and Disadvantages of Various Types of Contact Lenses on the differences between them.

see all of it:
https://en.wikipedia.org/wiki/List_o...lens_materials

[tf50fm]

FDA Classification of soft contact lenses

Soft contact lenses are one of several types on the U.S. Market approved by the U.S. Food and Drug Administration^[1] for corrective vision eyewear as prescribed by optometrists and ophthalmologists.^[2] The American Optometric Association published a contact lens comparison chart called Advantages and Disadvantages of Various Types of Contact Lenses on the differences between them.see all of it:
https://en.wikipedia.org/wiki/List_o...lens_materials

Thanks Chris for your reply, but these are all widely known information, whereas what I'm referring to are industry manufacturing knowledge, and specifically so on raw materials rather than the finished product itself. The FDA website might state some info but i'm sure there's more to that

[drk]

Why do you care?

[rbaker]

Why do you care?

No one cares enough to contact the ISO [ https://www.iso.org/standards.html ] and honestly I don't think that they have any data. While you are at it you could also check on Aunt Jemima pancake mix.

[fjpod]

following. what are your aim, if I might ask?

[Chris Ryser]

Names
IUPAC namepoly(2-prop-enamide)
Identifiers
CAS Number	9003-05-8
ChemSpider	none
ECHA InfoCard	100.118.050
UNII	5D6TC4BRWV (1500 MW)
Properties
Chemical formula	(C3H5NO)n
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).

see at:
https://en.wikipedia.org/wiki/Polyacrylamide