## Core Concept
Morgagnian cataract is a type of age-related cataract characterized by the liquefaction of the cortex and the sinking of the denser nucleus to the bottom of the lens, often associated with **lens degeneration** and **oxidative stress**. This condition typically affects older adults and can lead to significant visual impairment. Understanding the pathophysiology and clinical presentation of Morgagnian cataracts is essential for diagnosis and management.

## Why the Correct Answer is Right
Morgagnian cataracts are distinguished by the **liquefaction of the lens cortex** and the **settling of the nucleus** at the bottom of the lens due to gravity. This results in a characteristic "oil droplet" appearance of the nucleus and a dense, white or yellowish subcapsular opacity. The correct answer relates to the specific features and implications of Morgagnian cataracts, which are critical for differential diagnosis and surgical planning.

## Why Each Wrong Option is Incorrect
- **Option A:** Typically, Morgagnian cataracts are associated with **hyper mature cataracts**, where the lens material becomes liquefied. If an option suggests an association with an immature stage or another type of cataract, it would be incorrect.
- **Option B:** Morgagnian cataracts often present with **visual disturbances**, including glare, halos, and significant vision loss. An option denying these symptoms or suggesting an atypical presentation would be incorrect.
- **Option C:** The condition is known for its **surgical implications**, as it can lead to complications during cataract surgery, such as a high risk of posterior capsule rupture. An option that inaccurately describes these implications would be incorrect.
- **Option D:** If an option accurately describes a characteristic feature of Morgagnian cataracts, it would not be the correct answer to the question asking for an exception.

## Clinical Pearl / High-Yield Fact
A key clinical pearl is that Morgagnian cataracts can sometimes lead to **acute angle-closure glaucoma** if the liquefied lens cortex leaks through the intact lens capsule and blocks the pupil, causing a sudden increase in intraocular pressure. Recognizing this association can guide urgent management decisions.

## Correct Answer: D.