Yes, a vision impairment of 0.5 diopters does require glasses. Diopters are a unit of measurement used to describe the power of a lens. A diopter of 0.5 is considered a mild prescription, which is still strong enough to require corrective lenses.
The degree of vision impairment will depend on the amount of diopters needed to correct the vision. Mild cases of nearsightedness, farsightedness, or astigmatism that require 0.5 diopters of correction may not have a major impact on overall vision. However, it is still important to use corrective lenses since the impairment can still affect vision in certain tasks, such as reading.
In addition, vision impairments can worsen over time and glasses can help to slow down the progression. Wearing corrective lenses can help to ensure that vision remains clear and stable.
In conclusion, a vision impairment of 0.5 diopters does require glasses. It is important to wear corrective lenses to prevent further damage and ensure that vision remains clear and stable.