Interactive simulations for science teaching
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Focusing via Visual Accommodation
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- Summary
- By changing its curvature, the eye’s lens causes light rays to converge so that they focus on the retina – a process known as accommodation. You can observe this by dragging the miniature Eiffel Tower in the animation. This focusing is only possible beyond a limit called the "punctum proximum" or "near point". Otherwise, the image is formed behind the retina and so is blurred.
The diagram is not drawn to scale !
- Learning objectives
- To understand that accommodation is the result of the ability of the lens to adjust in order to keep objects focused on the retina, and that this ability has limits.
- How to use the animation
Click and drag the object along the optic axis.
- Keywords
- eye, Crytalline-lens, lens, retina, cornea, optic-nerve, near-point, image, focal, focusing
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- Share your ideas with us!