Final answer:
The progressive deterioration of the macula lutea is a condition known as age-related macular degeneration, commonly abbreviated as AMD, which is a leading cause of blindness.
Step-by-step explanation:
The correct abbreviation for the condition in which there is progressive deterioration of the macula lutea leading to loss of visual focus is AMD, which stands for age-related macular degeneration. AMD is the most common cause of blindness in the Western Hemisphere and affects millions of people worldwide. This condition arises from the death of the retinal pigment epithelium, which provides support to the macula. As the macula deteriorates, patients typically experience a growing black spot in their central vision, eventually leading to significant vision loss.