What is the weight of the steel ball used in a Drop Ball Test for dress safety lenses?

In the context of the Drop Ball Test for dress safety lenses, the appropriate weight of the steel ball used is indeed 6/10 ounces. This test is designed to assess the impact resistance of the lenses, ensuring they can withstand potential hazards that may occur in everyday use. The ball is dropped from a specific height onto the lens, and if the lens withstands this impact without cracking or breaking, it passes the test.

The specified weight of 6/10 ounces provides a standardized measure that balances the need for strength testing while maintaining a level that reflects real-world scenarios where the lenses may experience similar forces. This weight is critical for establishing safety standards in ophthalmic dispensing, which aim to protect the wearer from injury due to lens failure.

Understanding the importance of using the correct specifications during tests ensures that the resulting lenses provide adequate protection and meet regulatory requirements in ophthalmic dispensing practices.