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Low Vision > Lighting Glare And Tints > Flashcards

Lighting Glare And Tints Flashcards

1
Q

Inverse square law of illuminance

A

I=S/d2

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2
Q

Cosine law of illuminance

A

I=S x cos a

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3
Q

Illuminance formula

A

I = Intensity(S) x Cos a/d2

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4
Q

Effects of discomfort glare

A
  • VA not affected
  • subjective discomfort
    • fatigue/asthenopia/HA/squinting
  • relieved by tints
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5
Q

Effect of disability glare

A
  • reduced VA
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6
Q

Measurement of discomfort glare

A
  • Px adjusts the brightness of a light source until it reaches an ill defined threshold of unpleasantness
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7
Q

Methods of reducing glare

A
  • environmental control
  • visors
  • hats
  • typoscopes
  • tints
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Low Vision (14 decks)

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