No, the choroid is not the pigmented layer of the eye. The pigmented layer is called the retina, specifically the pigmented epithelium layer of the retina. The choroid is a vascular layer located behind the retina that provides oxygen and nutrients to the retina.
Retina
The choroid plexuses form the bulk of the heavily pigmented vascular layer in the eye. This layer is richly supplied with blood vessels and helps nourish the retina. The pigment in the choroid absorbs excess light, preventing it from scattering within the eye and improving visual acuity.
The choroid is the layer responsible for providing the pigmentation that forms most of the pigmented vascular tunic of the eye. It helps to absorb excess light and prevent reflection within the eye, contributing to visual acuity.
The uvea, also called the uveal layer, uveal coat, uveal tract, or vascular tunic, is the pigmented middle of the three concentric layers that make up an eye.
the macula
The Iris
The iris is a part of the uveal tract in the eye, specifically located in the anterior portion of the eye between the cornea and the lens. It is composed of connective tissue, smooth muscle fibers, blood vessels, and pigmented cells. The iris controls the size of the pupil in response to changes in light intensity.
The pigmented tunic you are referring to is the choroid, which contains melanin that absorbs excess light and prevents it from scattering within the eye. This helps to improve visual acuity and reduce glare.
The pigmented diaphragm of the eye is the iris, which is the colored part of the eye. It controls the size of the pupil, which regulates the amount of light entering the eye. The pigmentation of the iris determines a person's eye color.
sclera
The reflective layer in the lining of the eye is called the tapetum lucidum. It is a layer of tissue located behind the retina in animals that helps enhance night vision by reflecting light back through the retina.