[DOC] [TLE] HYDROGEL LENS MATERIALS - University of Missouri-St. Louis [PAR] Also called a soft contact lens. II. ... Lenses may also be made of different 
polymers which are related to HEMA. B. Water Content 1. Water content = weight 
of water in lens X 100 /total weight of lens 2. Range ... Group 4 - ionic polymers, 
high water (poly HEMA & hydrophilic monomers & increased levels of MAA, no 
NVP) e. [DOC] [TLE] Modern Contact Lens Materials: A Clinical Performance Update [PAR] Sep 1, 2002 ... High-water content soft lenses need to be made thicker than their low-water ... All 
contact lens materials are polymers, which are either ... material (poly-2-
hydroxyethyl methacrylate or polyHEMA) developed by Otto ... One approach to 
achieve this goal incorporates of two "phases" into the materials. [DOC] [TLE] Contact Lens Polymers - School of Engineering and Applied Sciences [PAR] During this time Otto Wichterle discovered poly(hydroxyethyl methacrylate), ... 
HEMA is a hydrogel that could be made into contacts using a simply and efficient 
spin cast method. ..... In soft contact lenses the water content affect many things. 
... make hydrogels from silicone based polymers like polydimethylsiloxane (
PDMS). [DOC] [TLE] Water properties of soft contact lens materials. - NCBI [PAR] The properties of water in soft contact lenses such as the water content, ... 
Specifically, lenses made from the following eight materials (and nominal water 
contents) ... [HEMA = 2-hydroxy-ethyl methacrylate, VP = vinyl pyrrolidone, MMA 
= methyl ... the other hand, medium and high water content materials exhibited 
multiple... [DOC] [TLE] Hydrogel Lenses - The College of Optometrists [PAR] hydrophilic polymers. Polymers are solid materials made from high-molecular- ... 
Materials made from one monomer are termed homopolymers ... That material 
was poly(hydroxyethyl methacrylate) or PHEMA. ... Hydrocurve thin lens (Soft 
Lenses, Inc.) in 1977 and subsequently ... water content was similar to that of 
PHEMA. [DOC] [TLE] Review of Cornea and Contact Lenses > The Fight Against ... [PAR] Jun 15, 2015 ... Unsafe contact lens wear can cause corneal ulcers, like this Pseudomonas case. 
... Increasing the water content results in a logarithmic increase in DK; however, 
... Adding silicone to soft hydrogel lens polymers increases the level of oxygen ... 
As the reciprocal of friction, when lubricity is high, friction is low. [DOC] [TLE] Some Facts About SiHy Lenses - Review of Optometry [PAR] Jul 15, 2010 ... High-Dk silicone hydrogel lenses give patients a convenient, comfortable, ... 
Traditional soft contacts are made from hydrogel polymerssoft, water-
containing plastics. Hydroxyethyl methacrylate (HEMA) is used to make the 
hydrophilic polymer. ... In conventional contact lenses, increasing the water 
content... [DOC] [TLE] Patent US6096799 - Contact lens of high water content and high ... [PAR] A contact lens of high water content and extremely high water balance made of a 
... water balance of more than about 8 relative to poly-2-hydroxyethyl 
methacrylate. ... The present invention also relates to polymers and hydrogels of 
GMA and to .... on the viscosity of 2-HEMA when blended with monomers like 
GMA and NVP. [DOC] [TLE] Patent US6245830 - Contact lens of high water content and high ... [PAR] Jun 12, 2001 ... A contact lens blank, comprising a polymer formed from a mixture of monomers in 
the ... The literature teaches that high water content lenses are susceptible to ... 
methacrylate (GMA) and 2-hydroxyethyl methacrylate (HEMA). ... In the '289 
patent, lenses made from this family of materials were shown, under... [DOC] [TLE] Biomedical applications of hydrogels: A review of patents and ... [PAR] Due to their high water content, porosity and soft consistency, they closely 
simulate ... Synthesis of hydrogels by cross-linking of ready-made water-soluble 
polymers. ... One possibility is the use of additional processes that lead to the 
highest ... a hydrogel based on poly-2-hydroxyethylmethacrylate (PHEMA) as a 
synthetic... [DOC] [TLE] Hydrogel: Preparation, characterization, and applications: A review [PAR] The ability of hydrogels to absorb water arises from hydrophilic functional groups 
attached ...

Question: The soft ones are made from high-water-content polymers like hydroxyethylmethacrylate
Answer: contact lenses