Ishihara Test Concepts and Procedures

The video tutorial by Dr. Amrit covers the Ishihara chart, a tool for testing color vision. It explains the chart's history, its design, and the different types of plates used in the test, such as demonstration, transformation, vanishing, hidden, diagnostic, and tracing plates. The video also details the testing procedure, including lighting requirements and interpretation of results, with a focus on identifying and diagnosing color blindness.

Who designed the Ishihara chart?

• Isaac Newton

• Albert Einstein

• Thomas Edison

• Shinobu Ishihara

What is the purpose of the demonstration plate in the Ishihara test?

• To diagnose color blindness

• To demonstrate the test procedure

• To confuse the patient

• To test for total color blindness

How do transformation plates help in identifying color blindness?

• They are invisible to everyone

• They show different numbers to colorblind individuals

• They appear the same to everyone

• They are visible only to colorblind individuals

What is the function of vanishing plates in the Ishihara test?

• To be invisible to everyone

• To be visible only to colorblind individuals

• To be visible only to those with normal vision

• To be visible to everyone

Which plates are used to determine the type and severity of color blindness?

• Transformation plates

• Diagnostic plates

• Demonstration plates

• Vanishing plates

What is the purpose of tracing plates in the Ishihara test?

• To test for total color blindness

• To be used by illiterate patients

• To diagnose red-green deficiency

• To confuse the patient

Why is proper lighting important during the Ishihara test?

• To confuse the patient

• To make the test more difficult

• To ensure accurate results

• To make the colors appear brighter

What type of bulbs should be avoided during the Ishihara test?

• LED bulbs

• Fluorescent bulbs

• Halogen bulbs

• Incandescent bulbs

How many plates does the US Navy use in their version of the Ishihara test?

• 17 plates

• 14 plates

• 21 plates

• 38 plates

What score is considered a pass in the US Navy's Ishihara test?

• 10 out of 14

• 11 out of 14

• 12 out of 14

• 13 out of 14