coatings applied to spectacle lenses

SUHAIL WAHABIsra School of Optometry

Protection Appearence Clarity Fogging

MAR Coating Tints UV Coating Scratch Resistant Coating Mirror Coating Polarised Coating Edge Coatings Polishes

Allows maximum Transmission. Hydrophobic. Oleo-Phobic. Anti-Static. Enhanced vision in low light Intensity. Reduces Ghost Images. Reduces Power-Ring effect. Makes eyes more visible. Easy to wear, Easy to care, Easy to clean.

Processes of tinting(vaccum deposition, Dye dipping/bathing, solid tinting)

Types (Solid, Gradient, Custom) Done for:

i. SunGlasses,ii. Cosmetic purpose,iii. Protection (unwanted Radiations, Laser

protection),iv. Eye Diseases(photophobia, Cataract, RP, ARMD),v. Headaches(VDU,Flourescine light).vi. Professional Use(Welding, skieng).

Made for SunGlasses. High Tech Film-—-molecules of polarizing

agent placed in specific order to block specific wavelength of light which is percieved as glare.

Reduces Glare Allows to see clearly with less eye strain. Used in: Water Sports, fishing, sailing. Limitations: VDU Screens, LCD’s, Mobile,

ATM.

Done by Bathing in UV solution before colouration.

Used for protective purposes. Used by skiers, mountaneers,

astronomers and Used by Pseudophakics. Normal coatings transmitt 5% while best

quality coatings allow only 2% UV rays.

Applied to front surface of SunGlasses only.

Prevents the appearence of eyes. Can Decrease the optical clarity or effect

negatively the propertiesof lens. It is used for cosmetic purpose only.

Applied to all plastic, Trivax and Polycarbonate lens.

Makes soft lens surface the properties of hard surface.

May be applied to Front, back or both surfaces of a lens.

Applied to plastic lenses, Specially 3 Piece and Half Rimless fittings.

It makes the edges of lens appear like the colour of the frame.

Polishes Applied to the edges of 3 piece and half

rimless glasses. It reduces the rough and thick

appearence of high prescriptions.