The lamina fusca is another name for which structure?

The lamina fusca is another name for which structure?

• A. Suprachoroid lamina
• B. Scleral spur
• C. Bruch's membrane
• D. Lamina cribrosa

Answer: (A)

The lamina fusca is the inner, pigmented layer lining the sclera at the boundary with the choroid—the suprachoroidal lamina. It sits between the sclera and choroid and is rich in melanocytes, giving it a dark appearance. This region forms the posterior scleral boundary with the choroid and is considered the same structure as the suprachoroidal lamina. Other structures listed have different roles and locations: the scleral spur is a anterior scleral thickening near the angle; Bruch's membrane lies between the retinal pigment epithelium and the choriocapillaris; and the lamina cribrosa is the sieve-like region of the posterior sclera through which optic nerve fibers pass.

The lamina fusca is the inner, pigmented layer lining the sclera at the boundary with the choroid—the suprachoroidal lamina. It sits between the sclera and choroid and is rich in melanocytes, giving it a dark appearance. This region forms the posterior scleral boundary with the choroid and is considered the same structure as the suprachoroidal lamina.

Other structures listed have different roles and locations: the scleral spur is a anterior scleral thickening near the angle; Bruch's membrane lies between the retinal pigment epithelium and the choriocapillaris; and the lamina cribrosa is the sieve-like region of the posterior sclera through which optic nerve fibers pass.