# The page is the light

> The eye has one key light, and it is the site itself. Each era's real home page is captured and stood in front of the eye at true size, where it lights the face and shows in the cornea.

- URL: https://www.kiruk.in/making/page-is-the-light
- Kind: Pattern
- Made: Sep 2026
- Author: Arun Kumaar Sreenivasan
- Part of: How this was made (https://www.kiruk.in/making)
- Agent file: https://www.kiruk.in/making/page-is-the-light/agent.md

## The problem

A rendered eye needs a light, and any light an artist invents is a studio light. It says "this is a 3D render". It also has nothing to do with the era.

## The move

Use the screen. Every era of this site has a real home page. A script opens each one, captures it at 768 px wide, and saves it. In the scene that picture becomes a rectangle with a real size and a real distance: a 1970 tube is 244 by 183 mm and sits 600 mm away. A phone is small and close.

That one rectangle does three jobs:

- it is the key light on skin, white and iris;
- its mirror image is the only bright thing in the cornea;
- its average brightness sets the size of the pupil.

Change the home page, run the capture, and the eye changes with it.

## What it rules out

Recolouring the eye to suit an era. An early 1970 tinted the iris green and it read as green fur. Colour arrives as light from the page, or as the medium the frame is drawn in. Pigment stays put.

## Lineage

### Came from

- [The shader eye](https://www.kiruk.in/making/glsl-eye) (Interface, Sep 2026): The second eye was a painting: one 850-line GLSL fragment shader that faked a whole eye in 2D on a full-screen quad. It found the idea of the page in the cornea, and then it hit its ceiling.

### Used by

- [The loader eye](https://www.kiruk.in/making/loader-eye) (Interface, May to Nov 2026): One human eye, drawn live in the browser and lit only by the screen it is looking at. It was built four times in six months, measured against a photograph of my own eye, and it changes era by blinking.
- [1970, phosphor](https://www.kiruk.in/making/1970-phosphor) (Interface, Oct 2026): The first of the ten ways of seeing. A green tube is the only light in the room, the picture is drawn in glowing cells, and a block cursor waits in the pupil. Every other era was built to match what this one got right.