Description and different types of tinted lens.

1. Tinted lens
BY:
NANDHU KRISHNA
2ND YEAR B.OPTOM

2. INTRODUCTION
 Tint lens means colour lens.
 Tinted lenses are made by dipping plastic lenses in appropriate organic dye.
 Tinted lenses are used in glasses or contact lenses.
 Tinted lens is also known as cosmetic lens.
 Tinted lens is a type of absorptive lens.
 Tints and coatings used in spectacle lenses serve for fashion purposes, make vision more
comfortable , Improve visibility & contrast and protect the eye from effects of harmful
radiations.

3.  Certain types of metals or metallic oxides are also used to make solid tinted lens.
 Cobalt oxide results in a BLUE lens, chromium oxide a GREEN lens, magnesium oxide a
VIOLET lens, and uranium oxide a YELLOW lens.
 Certain oxides have UV absorption properties and photochromic properties.

4. TYPES
Bright Tints
 Bright tints, like yellows and light browns are very in this season. Not only do they look fab, but
they also provide UV protection and superior clarity . They’re very effective at filtering out
blue light from electronic devices meaning they can be helpful for people using screens on a
regular basis.
Dark Tints
 Dark green or grey tinted sunglasses are ideal for when you’re out and about in the summer
sun. Dark tints Mute brightness , but maintain clarity and strong contrasts. They are dark
enough to provide Protection from glare , but are still light enough to ensure that your vision is
not impaired.

5. Types and benefits

8. Reasons for using tinted lens
 Luminous transmission factor
• Light sensitivity ( FL-14 glasses gives relief for photophobia)
• Contrast enhancement (YELLOW & ORANGE tints used)
• Reducing migraines ( FL-14 glasses-Filter out BLUE-GREEN light which cause migraines)
• Reading comfort and performance.
• Driving factors ( YELLOW , BROWN & GREEN )
 Ocular Conditions in which Tinted Ophthalmic Lenses are Prescribed
• Age-related macular degeneration (ARMD)
• Cataract .
• Diabetic retinopathy- Damage to blood vessels of retina as a complication of diabetes.
• Cone dystrophy - Loss of cone cells.
• Oculo-cutaneous albinism- Affect pigmentation of eye structures.