Tanrnayee from Std. X uses spectacles. The power of the lenses in her spectacles is-2.5 D. Answer the following questions:
Find the focal length of the lenses used in her spectacles.

Tanrnayee from Std. X uses spectacles. The power of the lenses in her spectacles is-2.5 D. Answer the following questions: State the type of lenses used in her spectacles.

Answer the following questions : Aniket from Std. X uses spectacles . The power of the lenses in his spectacles is -0.5 D. Answer the following question : State the type of lenses used in his spectacles.

Answer the following questions : Surbhi from Std. X uses spectacles . The power of the lenses in her spectacle is 0.5 D. Answer the following question from the given information : Find the focal length of the lenses used in her spectacles.

Surabhi from std. X uses spectacles. The power of the lenses in her spectacles is 0.5 D. Answer the following questions from the given information: Identify the type of lenses used in her spectacles.

Surabhi from std. X uses spectacles. The power of the lenses in her spectacles is 0.5 D. Answer the following questions from the given information: Identify the defect of vision Surabhi is suffering from.

Answer the following questions : Aniket from Std. X uses spectacles . The power of the lenses in his spectacles is -0.5 D. Answer the following question : Name the defect of vision Aniket is suffering from .

Answer the following questions : Surbhi from Std. X uses spectacles . The power of the lenses in her spectacle is 0.5 D. Answer the following question from the given information : Identify the defect of vision surabhi is suffering from .

Answer the following questions : When are bifocal lenses used in spectacles ?