To check accommodative facility, which of the following tools would you use?

To check accommodative facility, the use of a +2.00/-2.00 flipper is most appropriate. This tool provides a sufficient challenge to the patient's visual system, allowing for the assessment of how well they can shift focus from near (accommodating to the plus) to distance (relaxing to the minus) and vice versa. The +2.00 and -2.00 lenses are commonly used in clinical practice because they represent a realistic range that most patients should be able to accommodate effectively, thereby offering an effective balance between challenge and manageability.

Using lenses with higher powers, such as +3.00/-3.00 or +4.00/-4.00, may be too difficult for some patients, especially those who are not accustomed to using their near vision. The +1.00/-1.00 flipper may be too easy, failing to provide an adequate assessment of the full range of accommodative ability. Therefore, the choice of a +2.00/-2.00 flipper allows for an ideal evaluation of a patient's accommodative facility, making it the best option in this context.