Utilization of Outpatient Eye Care Services in Taiwan: A Nationwide Population Study

Table 2

Distribution of ICD-9-CM codes according to disease categories.

Disease categories	Percentage (%)
Disorders of conjunctiva	41.32
Disorders of refraction and accommodation	15.57
Disorders of eyelids and orbits	9.01
Disorders of lens	8.54
Disorders of cornea	4.71
Trauma	3.94
Disorders of retina	3.12
Disorders of lacrimal system	2.67
Glaucoma	2.66
Others, unclassified including vitreous disorders	1.7
Disorders of uvea (choroid, iris, ciliary body)	0.43
Disorders of globe	0.29
Strabismus and other disorders of binocular eye movements	0.18
Disorders of optic nerve and visual pathway	0.12
Blindness and low vision	0.04
Total percentage	94.3