Skip to main content
Fig. 5 | BMC Ophthalmology

Fig. 5

From: Diagnosis of posterior staphyloma using the radius of steepest curvature among retinal pigment epithelium segmentation line measured by optic coherent tomography

Fig. 5

MC index: meaning and application in clinical practice. The MC index is the reciprocal of the radius of curvature at the steepest RPE segmentation line. (MC index = 337.5/R). This is similar to a formula to convert the corneal radius into corneal diopters. In the current cohort, the MC index was > 40 in all eyes with posterior staphyloma (C, D). This seems to be an exclusive feature compared with eyes without posterior staphyloma (A). A steeper retinal pigment epithelium (RPE) segmentation line indicated a higher MC index. As the principles of the two formulas are the same, it is possible to indirectly compare the curvature of the RPE segmentation line to that of the cornea measured through keratometry. The curvature of the RPE with an MC index of 41.6 (B) is similar to the curvature of the central cornea with 42.0 diopter (B and C)

Back to article page

BMC Ophthalmology

ISSN: 1471-2415

Contact us