Black crust or discharge around a Ragdoll cat's eyes is often due to dried and hardened eye secretions. It can also be a result of flea dirt or minor scratches. To address this, pet owners can consider using supplements designed to reduce tear staining.

1. **Dried Eye Secretions:** When eye discharge is exposed to air, it can oxidize and harden. Gently moisten the area with a wet wipe or a cotton swab dipped in water to soften the crust before cleaning. If your cat experiences excessive discharge, consider a tear stain remover like oral supplements containing natural plant extracts. These products often contain ingredients such as chrysanthemum, which is known for its anti-inflammatory properties; cassia seed, which helps improve eye dryness and promotes retinal nerve cell development; honey, which aids liver metabolism; taurine, an anti-inflammatory and antibacterial agent, and B vitamins, which nourish the optic nerve and help regulate tear glands.
2. **Flea Dirt:** Black specks around the eyes could be flea droppings. In such cases, regular flea treatment and prevention is necessary.
3. **Scratches and Scabs:** If the black areas are caused by scratches or minor injuries around the eyelid, the resulting scabs might appear black. Gently clean these scabs as needed.