Chapter 11 Personal Health and Consumer Choices Lesson 2 Healthy Eyes and Ears Next >> Click for: >> Main Menu >> Chapter 11 Assessment Teacher’s notes are available in the notes section of this presentation.

 optometrist A health care professional who is trained to examine the eyes for vision problems and to prescribe corrective lenses A physician who specializes in the structure, functions, and diseases of the eye  ophthalmologist An eye condition in which the lens becomes cloudy as a person ages  cataract

 glaucoma An eye condition in which fluid pressure builds up inside the eye An eye condition in which images appear wavy or blurry  astigmatism A constant ringing in the ears  tinnitus

 deafness A condition in which someone has difficulty hearing sounds or has complete hearing loss The unit for measuring the loudness of sound  decibel

In this lesson, you will be able to  identify ways to keep your eyes healthy.  explain why people wear glasses or contact lenses.  describe ways to care for your ears.

Organizing Information As you read the lesson, create a chart that describes the function of each body part discussed in the lesson and how to care for it. Body PartFunctionCare Eyes Ears

Healthy Eyes Like a camera, your eyes focus light in order to give your brain a picture of the world around you. Eyes allow you to see shapes, colors, and motion.

Eye Care Never look directly at the sun. Wear sunglasses to protect your eyes from UV rays. Sit at least 6 feet from the television. Change the position of your computer monitor to cut down on glare. Make sure you have adequate lighting while you read, work, or watch TV. Wear protective glasses or goggles for certain types of work and sports. Don’t rub your eyes when something gets in them. See a doctor immediately if you experience eye problems.

Parts of the Eye

Eye Examinations Two health care professionals you may see for eye examinations are: An optometrist An ophthalmologist optometrist A healthcare professional who is trained to examine the eyes for vision problems and to prescribe corrective lenses ophthalmologist A physician who specializes in the structure, functions, and diseases of the eye

Eye Examinations Cataracts and glaucoma must be treated promptly. cataract An eye condition in which the lens becomes cloudy as a person ages glaucoma An eye condition in which fluid pressure builds up inside the eye

Correcting Your Vision The following vision problems can be helped with corrective glasses or contact lenses: astigmatism An eye condition in which images appear wavy or blurry Nearsightedness Farsightedness Astigmatism

Healthy Ears Ears not only allow you to hear sounds, they also give you a sense of balance.

Ear Care Wash and dry your ears regularly. Use a wet washcloth to wipe off dirt and earwax on the outside of your ear. Do not insert anything inside your auditory canal. If you get water in your ears, use special ear drops to prevent infection. Wear a hat, scarf, or ear muffs in cold weather. See a doctor immediately if any parts of your ear hurts or become infected.

Hearing Damage Common hearing problems are tinnitus and deafness. tinnitus A constant ringing in the ears deafness A condition in which someone has difficulty hearing sounds or has complete hearing loss

Hearing Damage Normal conversation has a decibel level of about 60. decibel The unit for measuring the loudness of sound Noises above 90 decibels can permanently damage the hair cells in the inner ear.

Hearing Damage Protect your hearing by wearing earplugs or protective headphones when you know you will be near loud sounds.

What I Learned Vocabulary What is the difference between an optometrist and an ophthalmologist? Lesson 2 Review

What I Learned Identify What roles do hair cells play in hearing and balance? Lesson 2 Review

What I Learned Explain What happens when sound waves reach your outer ear? Lesson 2 Review

Thinking Critically Analyze Janet plays on the soccer team. She is nearsighted and needs to correct her vision. What type of vision correction do you think might be best for Janet? Explain your reasoning. Lesson 2 Review

Thinking Critically Evaluate A woodshop produces noise that reaches 100 decibels. Should you wear ear plugs to reduce the risks of injury to your ears while working in the woodshop? Explain your reasoning. Lesson 2 Review

Chapter 11 Personal Health and Consumer Choices Lesson 2 Healthy Eyes and Ears Click for: End of >> Main Menu >> Chapter 11 Assessment