Lesion of right optic tract will leads to –
**Core Concept**
Lesion of the optic tract is a type of visual pathway lesion that affects the transmission of visual information from the optic chiasm to the lateral geniculate nucleus of the thalamus. This results in contralateral hemianopia, which is a loss of vision in the opposite half of the visual field.
**Why the Correct Answer is Right**
A lesion of the right optic tract will lead to a left homonymous hemianopia, which means that the patient will have difficulty seeing the left half of the visual field in both eyes. This occurs because the right optic tract carries visual information from the left visual field in both eyes, and damage to this tract disrupts the transmission of this information. The optic tract is a crucial part of the visual pathway, and lesions here can result in significant visual field defects.
**Why Each Wrong Option is Incorrect**
**Option A:** This option is incorrect because a lesion of the optic tract does not typically result in a loss of vision in the ipsilateral half of the visual field.
**Option B:** This option is incorrect because a lesion of the optic tract does not typically result in a loss of vision in the contralateral eye.
**Option C:** This option is incorrect because a lesion of the optic tract does not typically result in a loss of vision in the entire visual field.
**Clinical Pearl / High-Yield Fact**
It's essential to remember that visual field defects can provide valuable clues about the location and extent of lesions in the visual pathway. In this case, a left homonymous hemianopia suggests a lesion in the right optic tract or beyond.
**Correct Answer: C. Loss of vision in the left half of the visual field in both eyes**