Comparison of Time Domain and Spectral Domain Optical Coherence Tomography in Measurement of Macular Thickness in Macular Edema Secondary to Diabetic Retinopathy and Retinal Vein Occlusion

Table 4

Coefficient of repeatability (μm) for each subfield in each OCT device.

	Diabetic macular edema					Vein occlusion
	Cirrus SD-OCT		Stratus OCT	Spectralis OCT		Cirrus SD-OCT		Stratus OCT	Spectralis OCT
	Before correction	After correction		Before correction	After correction	Before correction	After correction		Before correction	After correction
Central	36	36	27	5	18	146	30	54	119	7
Inner superior	52	52	33	9	8	54	30	33	18	28
Inner nasal	18	18	26	6	14	60	49	19	110	11
Inner inferior	31	30	24	8	7	30	31	37	48	24
Inner temporal	35	35	22	7	20	33	25	50	41	20
Outer superior	36	36	23	6	20	20	15	27	64	19
Outer nasal	12	11	21	4	29	16	30	34	19	8
Outer inferior	24	23	26	10	8	10	10	31	15	11
Outer temporal	34	34	40	20	39	32	19	55	9	11