How The Eye Muscles Work

• What is the process of accommodation in the eye?

  It changes the lens's refractive power
• Why do glasses help with accommodation issues?

  They provide additional refracting power
• Which parts of the eye are important for accommodation?

  Cornea and lens
• What role do the ciliary muscles and suspensory ligaments play?

  They control the shape of the lens
• What is the fovea in the eye?

  It is the spot where light is focused
• How does the cornea contribute to vision?

  It refracts light to focus on the fovea
• What happens to light rays from distant objects?

  They are almost parallel when hitting the eye
• What shape does the lens take for nearby objects?

  Short and fat
• What occurs when the ciliary muscle contracts?

  It moves inwards towards the lens
• What happens to the suspensory ligaments when the ciliary muscle contracts?

  They slacken and become loose
• How does the lens change for distant objects?

  It stretches out to reduce curvature
• What is the medical term for long-sightedness?

  Hyperopia
• What is the medical term for short-sightedness?

  Myopia
• What type of lenses do glasses for long-sightedness use?

  Convex lenses
• What type of lenses do glasses for short-sightedness use?

  Concave lenses
• What happens when the lens refracts too much light?

  Light focuses before reaching the retina
• How do convex lenses help long-sighted individuals?

  They provide extra refracting power
• How do concave lenses assist short-sighted individuals?

  They refract light outwards to correct focus
• What are the differences between hyperopia and myopia?

  • Hyperopia (long-sightedness):
  • Can see distant objects clearly
  • Difficulty focusing on nearby objects
  • Image focuses behind the retina
  • Myopia (short-sightedness):
  • Can see nearby objects clearly
  • Difficulty focusing on distant objects
  • Image focuses before the retina
• What are the key components involved in the accommodation process?

  • Cornea: refracts light
  • Lens: fine-tunes refraction
  • Ciliary muscles: control lens shape
  • Suspensory ligaments: connect lens to ciliary muscles