Characteristics of Keratoconus Patients in Jordan: Hospital-Based Population

Figures & data

Table 1 The Socio-Demographic and Relevant Characteristics of 234 Patients with KC

	n (%)
Gender
Male	119 (50.9)
Female	115 (49.1)
Age in years
< 20	40 (17.1)
20–24	73 (31.2)
25–29	60 (25.6)
≥ 30	61 (26.1)
Occupation
Employed office based	33 (14.1)
Employed outside worker	27 (11.5)
Unemployed^a	109 (46.6)
Unknown	65 (27.7)
Affecting his/her daily activity	58 (24.8)
Presence of systemic disease	19 (8.1)
Past ocular history (POH)	60(25.6)
Family history of KC	55 (23.5)
Previous Cross linking (CXL)	28 (12.0)
Consanguinity degree in presence of family history of KC
1st degree	7 (2.9)
2nd degree	34 (14.5)
3rd degree	6 (2.6)
4th degree	8 (3.4)

Note: ^aStudents are included.

Table 2 The Clinical Presentation of KC Patients

Clinical Presentation	n	%
Decreased vision	166	70.9
Eye deviation	1	0.4
Frequent change of glasses	21	9.0
Headache	5	2.1
Incidental	11	4.7
Itching	2	0.9
Multiple	6	2.6
Screening family history of KC	3	1.3
Seeking refractive surgery	17	7.3
Uncomfortable with glasses	1	0.4
White lesion on the cornea	1	0.4
Total	234	100.0

Figure 1 Number of eyes according to KC severity.

Table 3 Clinical and Topographic Parameters According to Gender

	Female		Male		Total
	Mean	SD	Mean	SD	Mean	SD	P-value
BCVA^a	0.6	0.3	0.710	0.2797	0.673	0.2825	0.004
Sphere	−1.7	2.5	−0.8	2.3	−1.2	2.5	0.000
Cylinder	−2.9	1.7	−2.8	1.6	−2.8	1.6	0.499
Cornea thinnest location	455.5	55.5	461.9	50.0	458.8	52.8	0.192
K mean^b	48.9	5.8	46.5	4.2	47.7	5.2	0.000
K max^c	55.6	9.5	53.2	7.7	54.4	8.7	0.003

Notes: ^aBest-corrected visual acuity; ^bkeratometry mean; ^ckeratometry maximum.

Table 4 Clinical and Topographic Parameters According to Age

	<20		20–24		25–29		≥ 30		Total
	Mean	SD	Mean	SD	Mean	SD	Mean	SD	Mean	SD	P-value
BCVA^a	0.7	0.3	0.7	0.3	0.7	0.3	0.6	0.3	0.7	0.3	0.249
Sphere	−0.7	2.0	−0.7	1.6	−1.6	2.4	−1.8	3.3	−1.2	2.5	0.000
Cylinder	−2.6	1.5	−2.7	1.7	−3.0	1.7	−3.0	1.6	−2.8	1.6	0.223
Cornea thinnest location	460.0	48.7	460.9	50.7	454.9	63.1	459.3	46.8	458.8	52.8	0.828
K mean^b	47.5	5.0	47.6	5.2	47.6	4.6	47.9	5.9	47.7	5.2	0.955
K max^c	53.6	7.6	54.9	8.8	54.3	8.2	54.5	9.7	54.4	8.7	0.757

Notes: ^aBest-corrected visual acuity; ^bkeratometry mean; ^ckeratometry maximum.