Certified Ophthalmic Assistant Practice Exam

What is the most widely used method of visual field screening that requires no special equipment?

1. Amsler grid testing

2. Confrontation testing

3. Automated perimetry

4. Hess screen testing

The correct answer is: Confrontation testing

The most widely used method of visual field screening that requires no special equipment is confrontation testing. This technique is a simple and effective way for a clinician to assess a patient's peripheral vision by comparing the visual fields of both eyes. During the confrontation test, the examiner and patient face each other; the examiner then presents a target, typically a finger or a bright object, into the patient's peripheral vision from different angles, asking the patient to indicate when they can see the target. This method is advantageous in that it can be performed in any clinical setting without the need for advanced technology or specialized instruments. It allows for quick detection of significant visual field defects that may require further investigation. In contrast, methods like automated perimetry and Hess screen testing require specialized equipment, making them less accessible for routine screening in many clinical environments. The Amsler grid is specifically used for assessing central vision and is not designed for comprehensive visual field testing; therefore, it does not fit the criteria of being a widely used screening method for overall visual field assessment without special equipment.