Write the introduction of your paper on astigmatism with a hook, such as an anecdote or shocking statistic.
When you are writing a paper, the introduction is the most important part. It is the road map to what you will be writing about, or proving.
Every good introduction has these components.
Hook- Catch your reader’s attention.
Thesis- Explain your paper in one sentence.
-Preview- Describe what your paper is about, previewing what you will be writing about.
You are asking about the hook. For a paper on a scientific or health related topic like astigmatism, the best way to get the reader’s attention is anecdote or statistic. You will also want to include a solid, simple definition, like this one from enotes.
Astigmatism is the result of an inability of the cornea to properly focus an image onto the retina.
An anecdote is a little personal story. It can be about you or someone else. If you chose this topic, perhaps you have a personal connection to it? For example, you can describe an experience you had. How you were diagnosed and treated are good ways to end the story.
A second good scientific hook is a statistic. You will want to provide specifics. As ABC News notes, astigmatism is so common almost everyone has it to some degree. Severe astigmatism occurs to one in every 3 people. That means about 33% or one third of us have it! That is what I like to call a shocking statistic, and a good way to open your paper.