Table 1 34 symptoms categories shown in García-Muñoz et al.6 review.

From: Delphi methodology for symptomatology associated with visual dysfunctions

Symptoms

Asthenopia

Avoid near tasks

Be distracted

Blurred vision

Change reading distance

Close one eye

Difficulty focusing from one distance to another

Difficulty performing schoolwork

Diplopia

Dry or gritty eyes

Excessive blinking

Excessive sensitivity to light

Extraordinary reading or writing posture

Eye turn noticed

Feel sleepy

Get faint colours around words

Head or book tilt

Headache

Inability to estimate distance accurately

Lack of concentration

Loss of place when reading

Ocular pain

Pulling eyes

Reading problems

Red eye

Rubbing of eyes

School performance problems

Sore eyes

Stomach ache or nausea

Tearing

Visual discomfort

Visual fatigue

Watery eyes

Words appear to move or jump at near vision