Immune Privilege: Do Your Eyes Have a 'Separate' Immune System?

The video explains how the immune system protects the body from pathogens, but the eyes and brain maintain a distance from it to avoid inflammation and damage. The eyes have immune privilege, a special status that limits immune response to protect vision. This includes the blood-eye barrier, lack of direct lymphatic drainage, and immunosuppressive molecules. Antibacterial substances like lysozyme in tears help protect the eyes from bacteria. However, immune privilege can be a downside if a strong immune response occurs, potentially causing damage to the eye.

Why is the typical immune response of inflammation not suitable for the eyes?

• It can lead to vision impairment and tissue damage.

• It causes the eyes to become too dry.

• It enhances the regeneration of neurons.

• It increases the production of tears.

What is the role of the blood-eye barrier in the immune privilege of the eye?

• It allows immune cells to enter the eye freely.

• It prevents immune cells in the blood from entering the eye.

• It enhances the immune response in the eye.

• It increases the temperature of the eye.

How does the lack of direct lymphatic drainage contribute to the eye's immune privilege?

• It increases the production of white blood cells in the eye.

• It prevents immune cells from directly contacting the eye.

• It enhances the immune response in the eye.

• It allows pathogens to enter the eye easily.

What substance is released from the tear glands to protect the eyes from bacteria?

• Lysozyme

• Histamine

• Cortisol

• Adrenaline

What is a potential downside of the eye's immune privilege?

• It enhances the regeneration of eye tissues.

• It may result in collateral damage when faced with a strong immune response.

• It can lead to excessive tear production.

• It makes the eye more susceptible to dryness.