Linked from

The 16 pages that link to Iris, each with the reason it gives.

• CorneaRelated: Light passing through the cornea next reaches the pupil within the iris.

• Crystalline lensCompared with: The iris controls aperture, unlike the lens’s role in adjusting optical focus.

• PupilNarrower topic: The pupil is the opening whose size the iris changes.

• Aqueous humorRelated: Fluid passes through its pupil opening to circulate between the chambers.

• Slit-lamp examinationBroader topic: The microscope reveals its surface, shape, and signs of inflammation.

• UveitisBroader topic: Inflammation here can cause pain, light sensitivity, and adhesions.

• PhotophobiaBroader topic: Its response to light controls how much illumination enters the eye.

• Blue eyesNarrower topic: Its tissue and pigment determine how much light is absorbed or scattered.

• EyeBroader topic: It changes pupil diameter in response to light and other signals.

• Luigi IllicaRelated: Illica wrote the libretto for this opera by a composer outside the Puccini circle.

• Eye colorNarrower topic: Its layered tissue and pigment create the visible surface whose coloration defines eye color.

• AniridiaBroader topic: Its partial or complete absence defines aniridia.

• Human eyeBroader topic: Its muscles adjust the opening through which light enters.

• Blood–aqueous barrierBroader topic: Blood vessels within the iris contribute the barrier’s vascular component.

• Jim BroadbentBroader topic: Broadbent won the Academy Award for Best Supporting Actor for playing the older Bayley.

• Ocular Physiological PhenomenaBroader topic: Its muscles control how much light enters the eye.