tints Flashcards
graduated tint description
darker at top and light at bottom
can be single or dual coloured
pros of graduated tint
px can read in sunlight
cosmetics
cons of graduated tint
tint degrades with age
photochromic description
darkens when exposed to uv light
pros of photochromic
no separate sunglasses required
full uv protection
equitint can be used on high rx
cons of photochromic
take longer to lighten than darken
less reactive behind uv filter
residual colour with age
darken in cold temperatures
fixed tint description
glass- solid or laminated
plastic= dip dye
pros of fixed tint
solid doesn’t degrade with age as embedded within glass rather than dip dye
cons of fixed tint
one shade throughout. limited to uses and tint degrades with age
polarised tint description
polarised lens the vibrations are limited to one meridian. polarised in plane parallel to to reflecting surface.
pros of polarised tint
reduces glare and discomfort
good for px who fish, water sports
cons of polarised tint
can be used for driving however hard to see lcd displays on dashboard
ir lenses description
ir lenses protects against heat cataract and retinal burns from exposure to sun, furnaces and explosions
why must you apply uv coating to tinted lenses
pupils dilate–> more uv exposure–> more damage
why do px tint their lenses
enhance contrast
cosmesis
frame choice
protection
what does green tint do
transmits all colours evenly
dims glare
brightens shadows
who would u recommend green tint to
all outdoor activities in any weather conditions
rayban g-15
brown/amber tint
improves contrast
enhances depth perception
brown tint recommendation
golf, tennis any sport when distance needs to be judged.
good for weather that changes frequently
yellow tint
greater clarity in fog and low light conditions
filters out blue light which makes focusing difficult
yellow tint recommendation
skiing, mountain biking, hunting. good in foggy condition
purple tint
helps see contours and improves colour perception
cosmetically appealing
reduces glare
purple tint recommendation
spectator and gold
misty, foggy and snowy conditions
grey tint
anti fatigue
true colour perception
provides overall protection
reduces flare
grey tint recommendation
driving
baseball
tennis
sunny days
pink/red
enhances visual depth
reduces eye strain
good road visibility
helps adjust contrast
pink/red recommendation
cycling, racing, driving
what is the grading for tints
0- clear to very light- 80-100% 1-light tint- 43-80% 2- medium tint- 18-43% 3- dark tint- 8-18% 4- very dark tint- 3-8%
mirror tint coatings
supplied with dark tint so wearer doesn’t see themselves in the reflection
utilises constructive critiscism
doesn’t wear well
tends to scratch easily
uv coating
clear
protects from uv damage
not always provided with tinted lenses
