Which layer lies directly before the Inner Nuclear Layer in the inner-to-outer retina sequence?

Which layer lies directly before the Inner Nuclear Layer in the inner-to-outer retina sequence?

• A. Nerve Fiber Layer
• B. ILM
• C. Inner Plexiform Layer
• D. RPE

Answer: (C)

Retinal layers are arranged from inner (vitreous side) to outer. The inner plexiform layer sits just outside the ganglion cell layer and directly before the inner nuclear layer, forming the main synaptic area where bipolar cells connect to ganglion and amacrine cells. That positional relationship is why it lies immediately before the inner nuclear layer in the inner-to-outer sequence. The nerve fiber layer is closer to the inner surface than the ganglion cell layer, the ILM is the inner boundary of the retina, and the RPE lies far outer, adjacent to the photoreceptors. So the layer directly before the inner nuclear layer is the inner plexiform layer.

Retinal layers are arranged from inner (vitreous side) to outer. The inner plexiform layer sits just outside the ganglion cell layer and directly before the inner nuclear layer, forming the main synaptic area where bipolar cells connect to ganglion and amacrine cells. That positional relationship is why it lies immediately before the inner nuclear layer in the inner-to-outer sequence. The nerve fiber layer is closer to the inner surface than the ganglion cell layer, the ILM is the inner boundary of the retina, and the RPE lies far outer, adjacent to the photoreceptors. So the layer directly before the inner nuclear layer is the inner plexiform layer.