**Core Concept**
Glaucoma is a group of eye conditions that damage the optic nerve, often due to abnormally high pressure in the eye. In the context of glaucoma, disc signs refer to changes in the appearance of the optic disc, which can be indicative of the disease. These signs can include changes in the shape, color, or cupping of the disc.

**Why the Correct Answer is Right**
The disc signs in glaucoma include:
- **Cupping**: This refers to the enlargement of the optic cup, which is the area of the optic disc where the nerve fibers exit the eye. Cupping is a hallmark of glaucoma and can be seen as a shallow or deepening of the cup in relation to the disc diameter.
- **Notching**: This refers to a notch or indentation in the rim of the optic disc, often seen in glaucoma patients. Notching can occur due to the loss of nerve fibers and the subsequent collapse of the disc rim.
- **Haab's striae**: These are small, white or grayish lines that appear on the surface of the optic disc, often due to the stretching of the sclera.
- **Cigarske's striae**: These are similar to Haab's striae but appear as a wavy or irregular line on the surface of the optic disc.

**Why Each Wrong Option is Incorrect**
**Option A:** This option is not a disc sign in glaucoma. However, without knowing the actual options, we cannot determine which one is incorrect. Please provide the complete question with all options.

**Clinical Pearl / High-Yield Fact**
It's essential to remember that the presence of disc signs, such as cupping or notching, can indicate glaucoma, but their absence does not rule out the disease. A comprehensive eye examination, including visual field testing and tonometry, is necessary for a definitive diagnosis.

**Correct Answer:**