Vision Testing (2)

Question 1

Acuity

Answer 1

Aim to identify progressively smaller changes

- letters at distance

Question 2

Canada Minimum Eyesight Requirements

Answer 2

• Read letters less than 1.6mm high at a distance of 30cm or greater
• Colour vision sufficient to distinguish colours or shades used in NDT methods
• 20/30 or better in at least one eye

Question 3

Jaeger

Answer 3

Identifying letters in varying sizes from an arms length away

Question 4

Snellen

Answer 4

A score of

20/30 means that the subject can see at 20 feet what most people can see at 30 feet