Manipulation Of Vision Through Technology By: Shelby Burgess & Journi Rodriguez

Bifocals vs. Trifocals Bifocals are eyeglasses having lenses with two parts with different focal lengths. Trifocals are eyeglasses with lenses that have three parts. They are used to correct distance, intermediate (arm's length), and near vision.

Bifocals vs. Trifocals cont. A trifocal wearer looks through the intermediate zone when viewing something between 18 and 24 inches away. As where a bifocal wearer drops his eyes downward to read, or to see objects very close to them.

LASIK eye surgery Laser Assisted in Situ Keratomileusis (LASIK) is used to treat nearsightedness, farsightedness, and astigmatism. It is the most common type of laser eye surgery.

LASIK eye surgery cont. During a LASIK procedure, the cornea is reshaped, adjusting how the eye focuses. For example: Improve far vision by flattening the cornea. Improve near vision by steepening the curve of the cornea. Treat astigmatism by smoothing irregularity.

LASIK eye surgery cont. LASIK is an out-patient procedure. LASIK procedures typically take about 15 minutes. However, you will be at the doctor's office for approximately 1 to 2 hours.

Night Vision Goggles Even in the darkest of conditions, there are tiny bits of light present. Some of this light may be infrared light that isn't visible to the naked eye. Night vision goggles using image enhancement technology collect all the available light, including infrared light, and amplify it so that you can easily see what's going on in the dark.

Night Vision Goggles Hot objects, including human bodies, emit some heat in the form of infrared light. Night vision goggles using thermal imaging technology capture the infrared light being emitted as heat by objects in the field of view. In this way, you can see an image of what's going on in the dark based upon the amount of heat being generated by various objects.

What type of glasses are these? Trifocals Bifocals Split Vision None of the above

What kind of lens is this? Three Segmented Trisection Trifocal Bifocal

Which one is a night vision goggle? B

Which one is a picture of thermal imaging? B

What does LASIK use? Lasers Gamma Rays Light Beams Infrared Light

What does LASIK correct? Nearsightedness Farsightedness Astigmatism All of the above

How long does an average LASIK eye surgery take? 15 minutes 30 minutes 45 minutes to an hour 1-1.5 hours

What does LASIK eye surgery do? Remove the eye using lasers Reshape the cornea Dilate the pupil Remove decayed rods and cones

How do night vision goggles work? Rarefaction of non-visible spectrums of light. Amplification of non-visible spectrums of light. Amplification of visible spectrums of light. MAGIC!

A trifocal wearer looks through the intermediate zone when viewing something between ( ) and ( ) ( ) away. 20 & 50 Inches 18 & 24 Inches 10 & 15 Centimeters 4 & 5 Feet

1 2 3 4 5 6 7 8 9 10

1 2 3 4 5 6 7 8 9 10

Works Cited http://www.allaboutvision.com/lenses/multifocal.htm http://www.allaboutvision.com/visionsurgery/ http://wonderopolis.org/wonder/how-do-night-vision- goggles-work http://www.lasik.com/articles/lasik-procedure-a- complete-guide/