Certified Paraoptometric (CPO) Practice Exam 2025

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Which type of examination involves direct observation of the eye's interior structures?

Objective examination
Binocular examination
Indirect examination
Slit lamp examination

The correct answer is: Slit lamp examination

The slit lamp examination is specifically designed for the direct observation of the eye's interior structures. This examination utilizes a specialized microscope that allows the practitioner to closely examine the anterior segment of the eye, including the cornea, iris, lens, and other structures in detail. The slit lamp itself emits a narrow beam of light that can be finely adjusted to control illumination and magnification, thereby enhancing the visibility of various components within the eye. With this method, practitioners can detect abnormalities such as cataracts, corneal injuries, and other conditions that might affect the internal structures of the eye. Other types of examinations like objective examinations and binocular examinations do not focus primarily on the direct observation of the eye's interior. Objective examinations typically assess visual acuity and refractive errors, whereas binocular examinations assess how well the two eyes work together but may not provide detailed views of internal structures. Indirect examinations also involve the use of tools like indirect ophthalmoscopes but do so through an intermediary lens and do not allow for the same level of direct observation that a slit lamp provides.