Silicone hydrogel
Non-ionic is the most comfortable
British Manny
Korea Japan authentic cosmetic contact lenses
What is the material of cosmetic contact lenses?
PHEMA production material of cosmetic contact lenses: poly (2-hydroxyethyl methacrylate).
HEMA mixed materials: hydrophilic soft mirror materials based on HEMA and other auxiliary materials.
Non-HEMA material: hydrophilic soft mirror material without HEMA component. It is a soft hydrophilic material with hard mirror material methyl methacrylate as matrix and other monomer components added.
Advantages: soft texture, good plasticity, very comfortable to wear and short adaptation time.
Disadvantages: The lens material has low strength and is easily broken. The effect of correcting corneal astigmatism is poor. The lens surface has strong polarity, and it is easy to absorb the sediment in tears.
Polymer: the material of contact lens is a high molecular weight compound associated by high energy and strong bonds, which is a polymer.
Physical and chemical properties of high molecular weight compounds;
Light transmittance: the percentage of light with a specific wavelength passing through a material with a unit thickness is the light transmittance of the material. The light transmittance of contact lens materials is generally 92%-98%; Due to the depth of dyeing, the light transmittance will decrease by 5%-30%; Factors affecting the light transmittance of lenses: polymerization degree, hydration degree and purity.
Refractive index: the ratio of the speed of light in air to that in matter. The water content of contact lens materials is inversely proportional to the refractive index. That is, the higher the water content, the lower the refractive index of the lens.
Strength: the ability of a polymer to resist chemical damage. The forms of material stress include: tension, compression, impact, torsion, etc.
Elastic modulus: the stress produced after the material is deformed by force. The higher the elastic modulus, the stronger the ability of the lens to resist deformation, and the easier it is to recover when the external force is removed. The lens is easy to operate and can form an ideal refractive surface to correct astigmatism. (The elastic modulus of hard mirror is greater than that of soft mirror)
Plasticity: the ability of a material to shape itself according to the shape of its environment. Lenses with low elastic modulus are plastic, soft and comfortable to wear. But the correction of astigmatism is not ideal.
Density: the weight ratio of a substance to the same volume of water. The density of contact lens materials should be very small. Especially for thick lenses or toric lenses with high diopter (that is, astigmatism lenses), if the material density is too high, the stability of lens wearing may be affected by the weight of the lens and the force on the eyelids.
Hydrophilicity: the hydration ability of materials. Usually expressed as a percentage of water content. Because contact lenses are always immersed in tears in practical applications, they are always in a relatively fully hydrated state. The water content is generally 35%-80%, with high water content and good oxygen permeability. But the strength is poor and easy to be damaged; And there is more sediment.
Wettability: the degree to which water covers the material. The tear film on the lens surface with good wettability is stable, comfortable to wear and clear in vision.
Polarity: the number of ions on the surface of the material constitutes the polarity of the lens. The polarity of substances is related to the acidity of water environment. Strong polarity, good wettability, easy to attract the sediment in tears. (Ionic materials are more prone to protein precipitation than nonionic materials)
Oxygen permeability: refers to the ability of lens materials to allow oxygen to pass through in unit time. Represented by DK. The higher the DK value, the higher the oxygen permeability of the lens. The ways of obtaining oxygen for cornea are tear excretion, tear penetration and substance combination. The oxygen permeability is directly proportional to the water content of the material and inversely proportional to the thickness of the lens.
The main materials of soft contact lenses are hydrophilic substances, which are easy to adsorb protein and lipids in tears, resulting in deposits on the lens surface and shortening the service life of the lens.
Non-ionic contact lenses are the first choice. Protein and oil secreted in our tears are ionic and positively charged, while ionic substances themselves are negatively charged, so it is easy to adsorb protein. Non-ionic materials without any charge can reduce the precipitation of protein and lipid to a great extent, so choosing this kind of contact lens with anti-fouling non-ionic materials is a healthy guarantee.
What material is better for cosmetic contact lenses?
If you have a degree, go to a bigger and better optical shop. This is more accurate. Never go to a small shop, although it may be cheaper, but the quality is not enough, wearing eyes is harmful to yourself. It's best to buy seasonal hair dye, but I don't have it here. If you buy it for half a year, you can replace it in four or five months, which is more hygienic. Contact lenses are about to expire before wearing them. The brands of optical shops in different places are different, and the prices are different. I don't know. I can only suggest that you go to a good optical shop.
If you don't have a degree, you can buy it on the "sightseeing network", which is much cheaper than the optical shop. But I personally suggest going to an optical shop. After all, the retina is irreparable and should be taken seriously.
What is the material of cosmetic contact lenses?
PHEMA production material of cosmetic contact lenses: poly (2-hydroxyethyl methacrylate).
HEMA mixed materials: hydrophilic soft mirror materials based on HEMA and other auxiliary materials.
Non-HEMA material: hydrophilic soft mirror material without HEMA component. It is a soft hydrophilic material with hard mirror material methyl methacrylate as matrix and other monomer components added.
Advantages: soft texture, good plasticity, very comfortable to wear and short adaptation time.
Disadvantages: The lens material has low strength and is easily broken. The effect of correcting corneal astigmatism is poor. The lens surface has strong polarity, and it is easy to absorb the sediment in tears.
Polymer: the material of contact lens is a high molecular weight compound associated by high energy and strong bonds, which is a polymer.
Physical and chemical properties of high molecular weight compounds;
Light transmittance: the percentage of light with a specific wavelength passing through a material with a unit thickness is the light transmittance of the material. The light transmittance of contact lens materials is generally 92%-98%; Due to the depth of dyeing, the light transmittance will decrease by 5%-30%; Factors affecting the light transmittance of lenses: polymerization degree, hydration degree and purity.
Refractive index: the ratio of the speed of light in air to that in matter. The water content of contact lens materials is inversely proportional to the refractive index. That is, the higher the water content, the lower the refractive index of the lens.
Strength: the ability of a polymer to resist chemical damage. The forms of material stress include: tension, compression, impact, torsion, etc.
Elastic modulus: the stress produced after the material is deformed by force. The higher the elastic modulus, the stronger the ability of the lens to resist deformation, and the easier it is to recover when the external force is removed. The lens is easy to operate and can form an ideal refractive surface to correct astigmatism. (The elastic modulus of hard mirror is greater than that of soft mirror)
Plasticity: the ability of a material to shape itself according to the shape of its environment. Lenses with low elastic modulus are plastic, soft and comfortable to wear. But the correction of astigmatism is not ideal.
Density: the weight ratio of a substance to the same volume of water. The density of contact lens materials should be very small. Especially for thick lenses or toric lenses with high diopter (that is, astigmatism lenses), if the material density is too high, the stability of lens wearing may be affected by the weight of the lens and the force on the eyelids.
Hydrophilicity: the hydration ability of materials. Usually expressed as a percentage of water content. Because contact lenses are always immersed in tears in practical applications, they are always in a relatively fully hydrated state. The water content is generally 35%-80%, with high water content and good oxygen permeability. But the strength is poor and easy to be damaged; And there is more sediment.
Wettability: the degree to which water covers the material. The tear film on the lens surface with good wettability is stable, comfortable to wear and clear in vision.
Polarity: the number of ions on the surface of the material constitutes the polarity of the lens. The polarity of substances is related to the acidity of water environment. Strong polarity, good wettability, easy to attract the sediment in tears. (Ionic materials are more prone to protein precipitation than nonionic materials)
Oxygen permeability: refers to the ability of lens materials to allow oxygen to pass through in unit time. Represented by DK. The higher the DK value, the higher the oxygen permeability of the lens. The ways of obtaining oxygen for cornea are tear excretion, tear penetration and substance combination. The oxygen permeability is directly proportional to the water content of the material and inversely proportional to the thickness of the lens.
The main materials of soft contact lenses are hydrophilic substances, which are easy to adsorb protein and lipids in tears, resulting in deposits on the lens surface and shortening the service life of the lens.
Non-ionic contact lenses are the first choice. Protein and oil secreted in our tears are ionic and positively charged, while ionic substances themselves are negatively charged, so it is easy to adsorb protein. Non-ionic materials without any charge can reduce the precipitation of protein and lipid to a great extent, so choosing this kind of contact lens with anti-fouling non-ionic materials is a healthy guarantee.
What is the material of cosmetic contact lenses?
I think Cosmetic Contact Lenses made of silicone is very comfortable to wear. I recommend Cosmetic Contact Lenses from Orange.
What is the material of cosmetic contact lenses?
2-hydroxyethyl methacrylate, or hydrogel, is HEMA basic material. Look at the details of the goods on Taobao. There is a material introduction. Although the materials of HEMA soft contact lenses are different with different polymers, the combination of hydrophilic soft lenses is nothing more than homopolymer and copolymer, which mainly affects the water content, hardness, oxygen permeability, wettability and optical stability of the lenses.
Cosmetic contact lenses made of nonionic materials are suitable for anyone to wear.
Mainly depends on your requirements for beauty contact lenses, just like people buy good things and bad things, but they don't say who is suitable for whom.
Mt033066 is the mail delivery for beauty contact lenses.
Are cosmetic contact lenses hydrophilic or hydrogel?
This depends on your personal needs, comfort is enough, silicone hydrogel or something is just a gimmick …
What are cosmetic contact lenses made of?
Cosmetic contact lenses PHEMA generally made of 2-hydroxyethyl methacrylate.
HEMA mixed materials: hydrophilic soft mirror materials based on HEMA and other auxiliary materials.
Non-HEMA material: hydrophilic soft mirror material without HEMA component. It is a soft hydrophilic material with hard mirror material methyl methacrylate as matrix and other monomer components added.
Advantages: soft texture, good plasticity, very comfortable to wear and short adaptation time.
Disadvantages: The lens material has low strength and is easily broken. The effect of correcting corneal astigmatism is poor. The lens surface has strong polarity, and it is easy to absorb the sediment in tears.
Polymer: the material of contact lens is a high molecular weight compound associated by high energy and strong bonds, which is a polymer.
Physical and chemical properties of high molecular weight compounds;
Light transmittance: the percentage of light with a specific wavelength passing through a material with a unit thickness is the light transmittance of the material. The light transmittance of contact lens materials is generally 92%-98%; Due to the depth of dyeing, the light transmittance will decrease by 5%-30%; Factors affecting the light transmittance of lenses: polymerization degree, hydration degree and purity.
Refractive index: the ratio of the speed of light in air to that in matter. The water content of contact lens materials is inversely proportional to the refractive index. That is, the higher the water content, the lower the refractive index of the lens.
Strength: the ability of a polymer to resist chemical damage. The forms of material stress include: tension, compression, impact, torsion, etc.
Elastic modulus: the stress produced after the material is deformed by force. The higher the elastic modulus, the stronger the ability of the lens to resist deformation, and the easier it is to recover when the external force is removed. The lens is easy to operate and can form an ideal refractive surface to correct astigmatism. (The elastic modulus of hard mirror is greater than that of soft mirror)
Plasticity: the ability of a material to shape itself according to the shape of its environment. Lenses with low elastic modulus are plastic, soft and comfortable to wear. But the correction of astigmatism is not ideal.
Density: the weight ratio of a substance to the same volume of water. The density of contact lens materials should be very small. Especially for thick lenses or toric lenses with high diopter (that is, astigmatism lenses), if the material density is too high, the stability of lens wearing may be affected by the weight of the lens and the force on the eyelids.
Hydrophilicity: the hydration ability of materials. Usually expressed as a percentage of water content. Because contact lenses are always immersed in tears in practical applications, they are always in a relatively fully hydrated state. The water content is generally 35%-80%, with high water content and good oxygen permeability. But the strength is poor and easy to be damaged; And there is more sediment.
Wettability: the degree to which water covers the material. The tear film on the lens surface with good wettability is stable, comfortable to wear and clear in vision.
Polarity: the number of ions on the surface of the material constitutes the polarity of the lens. The polarity of substances is related to the acidity of water environment. Strong polarity, good wettability, easy to attract the sediment in tears. (Ionic materials are more prone to protein precipitation than nonionic materials)
Oxygen permeability: refers to the ability of lens materials to allow oxygen to pass through in unit time. Represented by DK. The higher the DK value, the higher the oxygen permeability of the lens. The ways of obtaining oxygen for cornea are tear excretion, tear penetration and substance combination. The oxygen permeability is directly proportional to the water content of the material and inversely proportional to the thickness of the lens.
The main materials of soft contact lenses are hydrophilic substances, which are easy to adsorb protein and lipids in tears, resulting in deposits on the lens surface and shortening the service life of the lens.
Non-ionic contact lenses are the first choice. Protein and oil secreted in our tears are ionic and positively charged, while ionic substances themselves are negatively charged, so it is easy to adsorb protein. Non-ionic materials without any charge can reduce the precipitation of protein and lipid to a great extent, so choosing this kind of contact lens with anti-fouling non-ionic materials is a healthy guarantee.
What are cosmetic contact lenses made of? What is its material? How about your eyes?
Different brands have different materials, so it won't hurt your eyes to wear care correctly.