Final answer:
The tennis player decided to get glasses to correct a likely vision problem, such as myopia, hyperopia, or astigmatism, that was affecting their perception of depth and clarity, which is crucial for their performance in sports. A routine eye exam confirmed the need for vision correction.
Step-by-step explanation:
The tennis player decided to get glasses because they likely experienced a significant improvement in their vision upon using them. When wearing 3-D glasses at a movie, someone with uncorrected vision problems may notice a dramatic difference in how they perceive depth and clarity, which can lead to the realization that they have been seeing the world in a less than optimal way. This can indicate an underlying refractive error such as myopia (nearsightedness), hyperopia (farsightedness), or astigmatism, which might only be evident during activities that require better visual acuity, like playing tennis. Corrective lenses, whether glasses or contact lenses, can significantly improve vision by adjusting the focus of light onto the retina, thereby enhancing the clarity of the perceived image.
During a routine eye exam, an optometrist or ophthalmologist evaluates a person's vision and eye health to determine if glasses or contact lenses are needed. Vision problems can develop or change over time, and getting an eye exam is crucial for maintaining optimal visual performance, particularly for athletes like tennis players whose sport depends heavily on hand-eye coordination and depth perception.