L1 - Macula Disorders 1

Macula

• 5.5mm (3DD)

Fovea

• 1.5mm (1DD)

Foveola

• Avascular zone
• Highest density of cones 
• 0.35mm diameter

Umbo

• Tiny depression 
• Foveal depression 

Inner retinal layers displaced laterally at foveola (up to OPL) - so top is OPL

1. Posterior vitreous face

2. Internal limiting membrane

3. RNFL

4. Ganglion cell layer

5. IPL

6. INL

7. OPL

8. ONL 

9. External limiting membrane

10. Photoreceptor layer (inner segments -> inner/outer segment junction -> outer segments)

11. RPE

12. Choriocapillaris (anterior of choroid)