Eye Dissection

Febuary 18th 2009
Bio 30
-Blog
-Dissection
-Ns exam next friday
-Brain/Eye/Ear test wed.
-Brian quiz
-intro senses
-Eye

• During this class we reviewed/named the eye parts and did a little review of what we were going to look at while dissecting.
• We talked about the sclera, how tough the outter surface was going to be and what tool we should use while trying to look on the inside, so we chose the scissors because they were the safest choice for what we were going to be doing.
• Then we got all the material out put safety glasses and gloves on and receved our eye.
• Our eye was covered with fat and muscles that had to be taken off before we could try to open up the eye.
• After all the fat and muscles are removed being careful not to cut off the optic nerve we attempted to try and cut into the sclera with our scissors.
• after both of us trying and no success we were told to carefully poke the eye and try and put out scissors into that hole that was created.
• It didn't work the first time but after the second time we finally got the scissors into the small hole that was created.
• We had a work sheet (investigation 46- The eye) that guided us through the dissection and made use think about the eye.
• now looking at both sides of the eye we found the vitreous homour was gell like yet clear. We even turned one of the sides over and found that it didn't come out by it's self.
• then we took the vitreous homour out and found that the lens is extremely hard and quite cloudy, but also we found a greenish blue color around where the retina should have been.
• We all thought that the colored part was the retina but it infact wasn't. we were shown where the retina was, which was bunched up in a ball by the optic nerve/ blind spot.
• we investigate more looking at all the parts of the eye and trying to figure it out. I don't think that we saw the fovea centralis though.
• so after we looked at the eye we had to clean up everything and put the eye's back into the bucket.

Now after everything was cleaned up one of my class mates asked if contact lenses help your eye's, so I did a little research and found that contact lenses are good but also bad for the eye's. In dusty conditions like driving a motor cycle or a bike contact lenses can actually damage your eye's or the contact lenses making it harder to see. long term use of contact lenses can cause an infection. If contacts are used for short periods of time they are good for your eyes if they are cared for properly. (School, marriage, party etc.) This person stated that glasses are better for you if you intend to use then all the time.