Which modality forms a real, inverted image?

Which modality forms a real, inverted image?

• A. BIO
• B. Direct Ophthalmoscopy
• C. Both
• D. Neither

Answer: (A)

A real, inverted retinal image is formed with binocular indirect ophthalmoscopy using a condensing lens. Light from the retina passes through the lens and rays actually converge to form a real image in space in front of the eye. That image is inverted relative to the retina, and it’s magnified, which is why the fundus can be viewed in detail when looking at the real image through the ophthalmoscope. In contrast, direct ophthalmoscopy produces a virtual, erect image because the optics do not create a real convergence point in space; you’re viewing a magnified image that appears upright. Hence, this modality uniquely forms a real inverted image.

A real, inverted retinal image is formed with binocular indirect ophthalmoscopy using a condensing lens. Light from the retina passes through the lens and rays actually converge to form a real image in space in front of the eye. That image is inverted relative to the retina, and it’s magnified, which is why the fundus can be viewed in detail when looking at the real image through the ophthalmoscope. In contrast, direct ophthalmoscopy produces a virtual, erect image because the optics do not create a real convergence point in space; you’re viewing a magnified image that appears upright. Hence, this modality uniquely forms a real inverted image.