1. THE REACTION OF CONTACT LENSES WITH HEAT.
Group : 2
Leader : Alice
Members: Thanh , Papa , Chatserin , Juna.

2. Introduction Contact lenses:
Thin plastic lenses can be placed directly on the surface of the pupil to correct the refractive errors of the eye
Contact lenses are considered medical devices and are used to correct eye defects, used to meet the aesthetic or therapeutic needs of ophthalmology.

3. helps people with nearsightedness, farsightedness,etc….
PROS
helps people with nearsightedness, farsightedness,etc….
the contacts won’t break as easily as the glasses
aesthetic
CONS
Not taking good care of it could cause eye infections or corneal damage
Cheap brands is cheap but could have a better chance in infections
Contacts can be easily damaged or lost

4. Objectives
To let others know about whether the contacts is safe or not safe to wear
whether the contacts can be resistant with heat or not

5. Materials
Contacts
Heat
Hot water
Contact cases

6. Variables to keep constant and changed
Temperature of the hot water
Contact lenses brands
Temperature of the heat

7. Experiment
We did an experiment to find out if whether the contact lenses near the heat would melt or dry by using fire and hot water near the contacts for 2 mins and checks if it melts or just shrinked

8. Results Brands SHO-BI Heat Shrink and dried up(the first to dry up)
Warm water
World
Shrink and dry up

9. conclusion
The more the amount of water,the more time the contacts had dried and shrink
No contacts got melted but instead they both shrinked and dried out