"Punctum remotum" refers to the far point of a person's vision. The word "punctum" is spelled with the IPA phonetic symbols /ˈpʊŋktəm/, with the stress on the first syllable, "pun". "Remotum" is spelled with the symbols /rɪˈməʊtəm/, with the stress on the second syllable, "moh". The combination of these two words is commonly used in the field of optometry to describe the furthest point at which an individual can clearly see an object.
Punctum remotum is a Latin term used in the field of optics, specifically in ophthalmology, to describe a concept related to visual acuity. In simple terms, it refers to the furthest point at which an individual with normal or corrected vision can see objects clearly without straining their eyes.
Also known as the "far point," the punctum remotum is determined by the shape and flexibility of the lens within the eye. It represents the maximum distance from the eye at which an object can be focused on the retina, creating a clear image. For individuals with healthy eyes, the punctum remotum is typically located at an infinite distance, as the lens can adequately adjust to focus on objects far away.
However, in cases of myopia (nearsightedness), the location of the punctum remotum shifts closer to the eye, making it difficult to see objects that are far away. In contrast, individuals with hyperopia (farsightedness) may have their punctum remotum placed further away, resulting in difficulties with near vision.
The measurement of the punctum remotum is an essential part of an eye examination, allowing eye care professionals to diagnose refractive errors accurately. By determining the location of the far point, appropriate corrective measures such as glasses, contact lenses, or refractive surgeries can be prescribed to enhance visual acuity and provide clear vision at various distances.
Far point.
A practical medical dictionary. By Stedman, Thomas Lathrop. Published 1920.
The term "punctum remotum" has its etymology rooted in Latin. "Punctum" translates to "point" or "dot", while "remotum" means "distant" or "removed". When combined, "punctum remotum" refers to the farthest point from which an eye can see objects clearly. This term has been traditionally used in the field of optometry to describe the maximum distance of distinct vision.