Related Clues

• Task to focus on
• It involves reading letters out loud
• Prerequisite for many a prescription
• Vision expedition?
• It often involves a Snellen chart
• Prerequisite for contacts
• Test for pupils?
• Test with letters
• Driver's license requirement
• Something you might get two 20s for?
• It might detect high cholesterol
• Driver's license test
• It usually involves reading letters
• Test involving reading letters
• It may involve dilation
• Test for 20/20
• Test involving gradually longer lines