Empirical Evaluation of Visual Fatigue from Display Alignment Errors Using Cerebral Hemodynamic Responses

Table 1

Ophthalmological classification of visual fatigue (asthenopia) with their respective symptoms.

Ophthalmological medical code	Ophthalmological symptoms
ICD-9, 368.1	Subjective visual disturbances
ICD-9, 368.10	Subjective visual disturbance
ICD-9, 368.13	Asthenopia, eye strain, photophobia