A temple marked 6 inches is closest in length to which measurement?

To determine the closest metric equivalent to a temple length of 6 inches, it's essential to understand the conversion from inches to millimeters. One inch is equal to 25.4 millimeters. Therefore, to convert 6 inches to millimeters, you would perform the calculation:

6 inches x 25.4 mm/inch = 152.4 mm.

Now, when comparing this result to the options provided, 152.4 mm is closest to 150 mm. This is why the correct answer is 150 mm, despite the initial assessment. Understanding the basic conversion metrics is crucial in ophthalmic dispensing, as it helps in accurately measuring and fitting eyewear based on different systems of measurement used globally.