Table 4. Accuracy of ophthalmic diagnoses by diagnoses, n (%).

		Internet users	Nonusers	p -Value a	All	Total no. of cases b
Refractive error	Correct	0 (0)	0 (0)	–	0 (0)	4 (3)
	Incorrect	0 (0)	0 (0)		0 (0)
	No prediction	1 (100)	3 (100)		4 (100)
Strabismus	Correct	0 (0)	0 (0)	–	0 (0)	3 (2)
	Incorrect	0 (0)	0 (0)		0 (0)
	No prediction	0 (0)	3 (100)		3 (100)
Chalazia/hordeola	Correct	4 (100)	2 (40)	0.17	6 (67)	9 (6)
	Incorrect	0 (0)	0 (0)		0 (0)
	No prediction	0 (0)	3 (60)		3 (33)
Blepharitis	Correct	0 (0)	0 (0)	–	0 (0)	3 (2)
	Incorrect	0 (0)	2 (67)		2 (67)
	No prediction	0 (0)	1 (33)		1 (33)
Other orbital inflammation (nontraumatic)	Correct	1 (100)	0 (0)	0.40	1 (20)	5 (3)
	Incorrect	0 (0)	1 (25)		1 (20)
	No prediction	0 (0)	3 (75)		3 (60)
Dry eye	Correct	0 (0)	0 (0)	1.00	0 (0)	22 (15)
	Incorrect	1 (20)	3 (18)		4 (18)
	No prediction	4 (80)	14 (82)		18 (82)
Subconjunctival hemorrhage	Correct	1 (50)	0 (0)	0.25	1 (13)	8 (6)
	Incorrect	0 (0)	0 (0)		0 (0)
	No prediction	1 (50)	6 (100)		7 (88)
Conjunctivitis	Correct	3 (43)	2 (25)	0.07	5 (33)	15 (10)
	Incorrect	4 (57)	1 (13)		5 (33)
	No prediction	0 (0)	5 (63)		5 (33)
Keratitis	Correct	2 (66)	0 (0)	0.11	2 (25)	8 (6)
	Incorrect	0 (0)	1 (20)		1 (13)
	No prediction	1 (33)	4 (80)		5 (63)
Anterior uveitis	Correct	1 (33)	0 (0)	1.00	1 (14)	7 (5)
	Incorrect	0 (0)	1 (25)		1 (14)
	No prediction	2 (67)	3 (75)		5 (72)
Cataract/posterior capsular opacification	Correct	0 (0)	1 (33)	–	1 (33)	3 (2)
	Incorrect	0 (0)	0 (0)		0 (0)
	No prediction	0 (0)	2 (67)		2 (67)
Vitreous disease c	Correct	0 (0)	0 (0)	1.00	0 (0)	4 (3)
	Incorrect	1 (50)	0 (0)		1 (25)
	No prediction	1 (50)	2 (100)		3 (75)
Retinal traction/detachment c	Correct	4 (57)	0 (0)	0.27	4 (36)	11 (8)
	Incorrect	1 (14)	1 (25)		2 (18)
	No prediction	2 (29)	3 (75)		5 (45)
Retinal vascular disease	Correct	1 (25)	0 (0)	1.00	1 (14)	7 (5)
	Incorrect	1 (25)	0 (0)		1 (14)
	No prediction	2 (50)	3 (100)		5 (71)
Retinal degeneration	Correct	0 (0)	0 (0)	0.33	0 (0)	3 (2)
	Incorrect	1 (100)	0 (0)		1 (33)
	No prediction	0 (0)	2 (100)		2 (67)
Optic neuropathy	Correct	0 (0)	0 (0)	–	0 (0)	3 (2)
	Incorrect	0 (0)	0 (0)		0 (0)
	No prediction	0 (0)	3 (100)		3 (100)
Inflammation due to trauma/foreign substance	Correct	2 (66)	7 (37)	0.16	9 (41)	22 (15)
	Incorrect	1 (33)	2 (11)		3 (14)
	No prediction	0 (0)	10 (53)		10 (45)

Note: “No prediction” indicates participants who did not provide self-diagnoses and instead selected the “I do not know” response.

^a Two-sided p -values with α level 0.05 for Internet users versus nonusers using Fisher's exact tests. Statistics not computed for groups with constant responses.

^bTotal 144 cases.

^cPosterior vitreous detachment included in retinal traction/detachment, not vitreous disease.