Final answer:
The two basic types of soft lenses are disposable lenses, used for short-term wear and discarded, and extended wear lenses, suitable for continuous use up to a week or more.
Step-by-step explanation:
The two basic types of soft lenses used are disposable lenses and extended wear lenses. Disposable lenses are designed for short-term use, from a single day to a couple of weeks, and are then discarded. Extended wear lenses can be worn for more extended periods, such as overnight, and are suitable for continuous use, typically up to a week or longer without removal.
Soft contact lenses are often preferred for their comfort and ability to correct vision problems such as myopia (nearsightedness) and hyperopia (farsightedness). A third type that is also common are daily wear lenses, which must be removed and cleaned at the end of each day. Others, such as toric lenses, are designed for correcting astigmatism, while colored lenses can enhance or change eye color.
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