Table 4. Corneal epithelial thickness in different zones in seven groups of females according to age.

*statistical significance

Section	Age Groups							Correlation With Age
	10-20 y	21-30 y	31-40 y	41-50 y	51-60 y	61-70 y	˃ 70 y	R	p-value
Central (2 mm)	55.4±3.8	57.2±3.8	58.3±5.7	60.4±5.4	62.2±6.7	61.2±5.0	60.3±4.5	0.307	0.0001*
Paracentral (2-5 mm)
Paracentral nasal	54.1±5.5	54.6±5.2	54.6±5.3	56.3±4.4	54.7±4.0	59.1±7.6	55.7±3.5	0.014	0.0716
Paracentral inferior nasal	54.6±3.4	55.1±3.7	55.8±4.5	57.0±4.3	57.2±3.1	57.3±6.4	56.0±2.4	0.155	0.0157*
Paracentral inferior	54.6±4.3	55.4±4.1	56.2±4.3	58.1±4.4	57.4±4.5	60.3±5.2	56.0±1.9	0.258	0.010*
Paracentral inferior temporal	53.1±3.2	55.0±5.6	55.7±5.2	57.5±4.4	56.3±4.8	60.1±4.3	55.5±2.3	0.164	0.007*
Paracentral temporal	52.6±5.2	53.5±6.6	53.7±4.5	56.1±4.3	54.4±3.4	60.1±7.6	52.7±3.2	0.199	0.0007*
Paracentral superior temporal	53.1±6.9	52.3±3.8	53.5±5.8	53.2±4.0	55.9±4.2	55.7±3.9	55.2±11.1	0.088	0.1195
Paracentral superior	52.8±5.8	52.4±3.7	52.9±4.7	53.8±3.5	53.9±4.0	53.0±3.4	52.7±2.9	0.058	0.8325
Paracentral superior nasal	53.7±5.6	53.2±3.9	53.3±5.7	53.9±3.2	55.5±3.3	57.6±7.6	59.8±12.0	0.189	0.0035*
Midperipheral (5-7 mm)
Midperipheral nasal	61.2±8.1	60.9±10.6	60.8±7.9	62.4±8.8	57.5±7.9	63.7±8.07	60.0±10.2	-0.076	0.5679
Midperipheral inferior nasal	63.2±8.6	61.2±7.7	65.3±8.4	61.1±5.5	58.1±2.8	58.2±5.7	56.2±5.3	-0.143	0.0008*
Midperipheral inferior	62.5±7.9	62.4±10.7	62.7±7.8	63.6±9.2	58.7±6.4	59.5±8.5	62.2±10.2	-0.027	0.5871
Midperipheral inferior temporal	62.7±9.6	61.0±9.9	60.5±8.1	62.3±7.9	58.3±4.3	63.2±3.8	59.3±1.4	-0.229	0.4395
Midperipheral temporal	56.9±8.0	55.7±7.1	57.8±8.0	63.3±12.0	55.9±5.9	61.1±8.4	55.7±7.4	0.014	0.060
Midperipheral superior temporal	56.2±12	52.8±10.7	54.0±7.9	57.9±11.4	56.8±9.6	56.3±9.4	60.8±17.4	0.053	0.2757
Midperipheral superior	58.7±17	54.0±10.7	54.0±7.3	60.4±12.1	61.5±13.0	55.1±9.1	59.5±8.4	0.068	0.1026
Midperipheral superior nasal	58.9±9.6	55.7±9.8	56.4±9.9	59.2±10.8	59.6±5.8	58.2±12.2	67.0±19.7	-0.205	0.0561