How can you intentionally make your eyes red on camera for a specific effect or look?

To intentionally make your eyes red on camera for a specific effect or look, you can try using eye drops that contain ingredients like tetrahydrozoline or naphazoline, which constrict blood vessels and temporarily make the eyes appear red. However, it is important to use these eye drops sparingly and carefully, as overuse can lead to potential side effects and eye irritation.