The Bones Around Your Eye and How They Can Break Your eye sits in a cone-shaped hollow in the skull, and that hollow is not carved from a single piece of bone. It is assembled from seven separate bones that meet along seams, and they are not all the... Eye Anatomy Optic Nerve Sep 28, 2025
Inside the Pupil: What Makes It Open and Close The black circle at the center of your eye is not a part. It is a gap. The pupil is simply the opening left in the middle of the iris, and it looks black because almost no light that goes in comes bac... Eye Anatomy Optic Nerve Pupil and Iris Sep 14, 2025
The Retina: How the Back of Your Eye Turns Light Into Sight Your eyes gather light all day, but you do not actually see anything until that light reaches the back wall of the eyeball. The retina is that wall. It is a thin sheet of nerve tissue lining the insid... Eye Anatomy Optic Nerve Retina Sep 13, 2025
Rods and Cones: The Cells That Turn Light Into Sight Everything you have ever seen started as a chemical reaction in a cell smaller than a speck of dust. The retina lining the back of your eye holds roughly 125 million of these light-sensitive cells, an... Eye Anatomy Optic Nerve Retina Sep 12, 2025
The Sclera: What the White of Your Eye Is Made Of The white part of your eye has a name, and it does more work than its plain appearance suggests. The sclera is the tough outer shell of the eyeball, and it wraps around roughly five-sixths of the glob... Cornea Eye Anatomy Optic Nerve Sep 10, 2025
The Trabecular Meshwork: Your Eye's Pressure Valve Your eye is a pressurized ball. It has to be, because a firm globe holds its shape, keeps the cornea curved correctly and keeps the retina pressed smoothly against the back wall. That pressure comes f... Eye Anatomy Optic Nerve Pupil and Iris Sep 8, 2025
Eye Teaming: How Two Eyes Build One Steady Image Look at anything in front of you right now. You see one of it, not two, even though two eyes are sending two separate pictures inward. That single steady image is not something your eyes hand over fin... Eye Anatomy Optic Nerve Retina Sep 1, 2025
How Vision Works: From Light to What You Recognize Seeing feels instant and effortless, which hides how much has to go right. Light has to be bent, focused, converted into electricity, shipped down a nerve and then rebuilt into something meaningful. K... Cornea Eye Anatomy Optic Nerve Retina Aug 31, 2025
Peripheral Vision: Why the Edges See Motion, Not Detail While you read this sentence, you are also aware of the edge of the screen, the room around it, and anything that moves nearby. You are not reading with that part of your vision. You are monitoring wi... Eye Anatomy Optic Nerve Retina Aug 29, 2025
Visual Tracking: How Your Eyes Move Across a Page Reading a page looks like a smooth glide across the text. It is nothing of the sort. Your eyes jump, stop, jump again, and the stops are where the reading actually happens. When those jumps land badly... Eye Anatomy Optic Nerve Aug 27, 2025
What Your Eye Doctor Reads From the Optic Disc Toward the end of an eye exam, the doctor shines a bright light in and spends a while looking at one small spot at the back of your eye. That spot is the optic disc, and it earns the attention. The di... Eye Anatomy Optic Nerve Retina Aug 24, 2025