[DOC] [TLE] Learn about Your Eye and How Vision Works! - Home Science Tools [PAR] The outside layer of the eye is made up of the sclera and the cornea. ... When you 
look at a person's eye, you can see parts from each of the first two layers: the ... 
When you look at an object that is close by, the ciliary muscles are contracted... [DOC] [TLE] Eyes - KidsHealth [PAR] They let us know how close it is, whether it's standing still or coming toward us, 
and ... enabling us to judge distance and the size of objects to help us move 
around them. ... The visible part of the eye is protected by the eyelids and the 
eyelashes, ... and other irritants that get past the defenses of the eyelashes and 
eyelids. [DOC] [TLE] Accommodation of the Eye to Different Focus Distance - HyperPhysics [PAR] When the eye is relaxed and the interior lens is the least rounded, the lens has its 
maximum ... The matrix for that part of the eye was calculated and then the 
thickness d and back ... curves shape, increasing it's refractive power to 
accommodate for closer viewing. ... Many animals can see clearly both in water 
and on land. [DOC] [TLE] Presbyopia | What Causes It? | How To Treat It - All About Vision [PAR] The eye's lens stiffens with age, so it is less able to focus when you view 
something up close. ... to stem from a gradual thickening and loss of flexibility of 
the natural lens inside your eye. ... With less elasticity, the eye has a harder time 
focusing up close. ... Bifocal means two points of focus: the main part of the 
spectacle lens... [DOC] [TLE] Age-related Long Sight (Presbyopia). Longsightedness | Patient [PAR] It is a normal part of ageing, and not a disease. As you get older, you find it ... 
finely adjusts the focusing. The lens does this by changing its thickness. ... In 
order to see close-up objects, our eyes have to accommodate. This means that 
the lens... [DOC] [TLE] Short Sight - Myopia. Refractive disorders and short sightedness ... [PAR] Short sight leads to blurred distance vision, but close vision is usually normal. ... 
eyeball, or because age has affected the workings of the focusing parts of the eye
. ... When we look at an object, light rays from the object pass through the eye to 
reach ... The lens does this by changing its thickness. .... Sign up to our newsletter
. [DOC] [TLE] How the Human Eye Works - Live Science [PAR] May 5, 2016 ... To see closer objects clearly, the ciliary muscle must contract in order ... the retina 
is the innermost of three tissue layers that make up the eye. [DOC] [TLE] Accommodation (eye) - Wikipedia [PAR] Accommodation (Acc) is the process by which the vertebrate eye changes optical 
power to maintain a clear image or focus on an object ... a decrease in their 
ability to focus on close objects and hence require glasses for reading ... 
However, the constriction of the pupils is not part of the process called lens ... See 
also[edit]. [DOC] [TLE] Eye Health: Anatomy of the Eye - VisionAware [PAR] Sign up with VisionAware to receive free weekly email alerts for more helpful 
information ... The lens becomes more rounded to focus on near objects (see 
Figure 1): ... You can get a closer look at different parts of eye with this interactive 
eye... [DOC] [TLE] The Crystalline Lens - TedMontgomery.com [PAR] When the eye is viewing an object at a far distance (such that parallel rays of light 
... (View another graphic: Accommodation of the Crystalline Lens.) ... up from a 
long period of close work, and this is that objects across the room are a little 
blurry. .... lens contains the far prescription and the bottom portion the near 
prescription. [DOC] [TLE] ciliary body - The Worlds of David Darling [PAR] This allows the lens to thicken, increasing the eye's ability to focus up close. 
When looking at a distant object, the ciliary body relaxes, causing the suspensory

Question: To see objects close up, this part of the eye thickens
Answer: Lens