Fovea Centralis
iris
The diaphram Is What Controls How Much Light Is Released.
Pupil.
Diaphragm
The pupil goes larger in the dark, and smaller in the light.
The light diaphragm
The Diaphram regulates the amount of light in the body tube
diaphragm
The light diaphragm
A diaphragm
The diaphragm regulates the amount of light that reaches the objective lens. It is also called the iris.
The diaphram Is What Controls How Much Light Is Released.
Diaphram
iris
The biconcave structure is the "lens, but his focuses the light, it does not adjust for the amount of light. The structure that adjusts for the amount of light entering the eye is the "iris"
It regulates the amount of light that passes through a specimen.
Pupil.
The condenser and its diaphragm.