Tints Flashcards
What re the advantages of green/grey tints?
Px preferred over grey gives crisper contrast than brown
What re the advantages of neutral grey tints?
Good colour fidelity
What re the advantages of brown/amber tints?
Better contrast and depth perception than grey. Colours are distorted. Are great for blue light conditions eg overcast hazy foggy conditions highlights the difference in greens great for golfers/baseball players
What are the advantages of driving tints?
Yellow lenses add contrast decreases fatigue and increases van when driving in fog/haze evening/nights good for bikers /Pilots /tennis players/ hunters and sport shooters.
What re the advantages of orange tints?
Eliminates blue light good for tracking against blue eg golf /baseball /clay target shooting / also useful for skiers bikers and hunters.
What re the advantages of vermillion tints?
Good for hunting and fishing great for contrast improvement.
What re the advantages of red tints?
Good for clay target shooters on sunny days fishing in morning/late evening
What re the advantages of violet tints?
Good for mid - brightness conditions. mostly a fashion tint
What is martins rule of tilt
For every 2degrees of pant reduce heights by 1mm
What is a scotoma?
A n area outside if the fov
What is a myodisc lens design
High powered -lenticular Plano carrier unusable for vision.cyl ground onto front.
What is a -lenticular design
Like a myodisc but on a curved carrier giving thinner edge
What are hi index lenses made from?
Polyurethane a cross linked thermosetting mr-7 n=1.66-1.67 has a 30%sulfur content. Mr174 n=171-174 has 60% sulfur.
What are mid index lenses are made from?
Acryllic (pmma) can be thermosetting or plastic cross linked can ales be combined with urethane.
