About the Eye
Which structure in the eye affects the refraction of light, thereby influencing the accuracy of focusing?
How does focusing in the eye differ from focusing in a camera?
Compare the mechanisms by which the eye and a camera form clear images.
The blind spot lacks photoreceptor cells, so why don’t we see black spots when looking at things?
What could cause the inability to focus on distant objects?
Does having bloodshot eyes affect vision?
Why does red-eye sometimes appear in photographs?
How can red-eye be avoided in photographs?
The size of the pupil changes, but the transparent area in the center of colored contact lenses does not. How is the size of the transparent area in colored contact lenses determined?
Without surgery, is it possible to treat nearsightedness?
Advanced Questions About the Ear
How does the shape of the auricle (outer ear) affect hearing?
List all possible causes of hearing loss. Which of these causes are irreversible?
How does the body prevent damage to the eardrum?
When external sounds are too loud, how can we protect our ears from damage?
Why does human hearing decline underwater?
Can humans hear sounds from land when underwater?
Why do some people experience seasickness?
Why is hearing less clear when the mouth is closed?
Why does sneezing sometimes lead to middle ear infections?
What is the principle behind hearing aids? Who cannot rely on hearing aids to maintain their hearing?