**Core Concept**
The question is related to the phenomenon of light refraction through the lens of the eye, specifically the formation of an image on the retina. The correct answer is related to the concept of total internal reflection, which occurs when light passes from a medium with a higher refractive index to a medium with a lower refractive index.

**Why the Correct Answer is Right**
The correct answer is related to the formation of an image on the retina due to the refraction of light through the lens. The image is formed when light from an object passes through the cornea and the lens, which bend the light rays. The light rays then converge at a point on the retina, forming an inverted image. The wave (arrow) shown in the photograph is due to the total internal reflection of light at the air-retina interface. This phenomenon is also known as the "critical angle" and is related to the concept of Snell's law.

**Why Each Wrong Option is Incorrect**
**Option A:** This option is incorrect because it does not describe the correct phenomenon of light refraction through the lens of the eye.

**Option B:** This option is incorrect because it does not accurately describe the formation of an image on the retina.

**Option D:** This option is incorrect because it does not relate to the concept of total internal reflection and the formation of the wave (arrow) shown in the photograph.

**Clinical Pearl / High-Yield Fact**
It's worth noting that the critical angle is related to the refractive indices of the two media involved, and it is an important concept in understanding the formation of images on the retina.

**Correct Answer: C. Total internal reflection.**