6.2 The Retina - OpenStax, Introduction to Behavioral Neuroscience (CC BY-NC-SA 4.0) - Explains the retina's cell layers, rods versus cones, phototransduction, and color blindness in clear steps. It is the main source for this chapter's photoreceptor numbers and cone sensitivity peaks.
6.4 The Thalamus and Primary Visual Cortex - OpenStax, Introduction to Behavioral Neuroscience - Covers the crossing at the optic chiasm, the layered LGN, and Hubel and Wiesel's discovery of edge-detecting cells in V1. Great for readers who want more detail on simple and complex cells.
6.5 Extrastriate Cortex - OpenStax, Introduction to Behavioral Neuroscience - Describes the dorsal and ventral streams, the motion area MT, and face-selective neurons. A good next step after Section 5.10.
Color Blindness - National Eye Institute (NIH) - A plain-language overview of color vision deficiency, who gets it, and how people adapt. Useful for checking facts about how common it is.
Pituitary Tumors - National Institute of Neurological Disorders and Stroke (NIH) - Explains what pituitary tumors are, their symptoms (including vision changes), and how they are diagnosed and treated. Good background for the Bedside case.
Pituitary tumor - MedlinePlus Medical Encyclopedia (U.S. National Library of Medicine) - A short patient-friendly page on symptoms, tests such as visual field testing and MRI, and transsphenoidal surgery through the nose.
Localizing the Lesion (Visual Fields) - Jonathan Trobe, NOVEL (Neuro-Ophthalmology Virtual Education Library), University of Utah - A neuro-ophthalmologist's guide matching each visual field pattern to a lesion site. Advanced, but excellent for Brain Bee competitors who want to check every pattern in the simulator.
Optic radiation - Wikipedia - Describes the path of the optic radiation from the LGN to V1, including Meyer's loop and the "pie in the sky" defect. Use it as a starting point and check claims against the other sources here.
One brain, two visual systems - Mel Goodale and David Milner, The Psychologist (British Psychological Society), 2006 - The scientists behind the "perception versus action" idea tell the story of patient D.F. in their own words. A readable look at how one patient changed a field.