How Do You Spell LONG SIGHTEDNESS?

Pronunciation: [lˈɒŋ sˈa͡ɪtɪdnəs] (IPA)

Long sightedness, also known as hyperopia, is a common visual impairment affecting over 20% of the population. The term long sightedness is spelled using the IPA (International Phonetic Alphabet) phonetic transcription as lɒŋ ˈsaɪtɪdnəs. The diacritical marks above certain letters, such as the ɒ and ɪ, indicate specific vowel sounds. Long sightedness occurs when the eyeball is shorter than normal, causing difficulty focusing on close-up objects, and can be corrected with glasses or contact lenses.

LONG SIGHTEDNESS Meaning and Definition

1. Long-sightedness, also known as hyperopia or hypermetropia, is an ophthalmological condition where a person experiences difficulty in clearly seeing nearby objects, while being able to see distant objects with relative ease. It is a refractive error of the eye that affects the ability of the eyes to focus on nearby objects due to an anomaly in the shape of the eyeball or the lens.

   In a long-sighted eye, the focal point falls behind the retina instead of directly on it. This occurs when the eyeball is too short or the cornea has a shallow curvature. As a result, when attempting to focus on nearby objects, the light rays entering the eye converge at a point beyond the retina, causing blurred vision. However, when objects are at a distance, the light rays converge normally and focus on the retina, resulting in clear vision.

   Long-sightedness can be hereditary or develop due to age-related changes in the eye. Common symptoms include eyestrain, difficulties with reading or close work, and headaches. It can be diagnosed through a comprehensive eye examination, including visual acuity tests and refraction tests.

   Long-sightedness is typically corrected using concave lenses, which redirect the light rays inwards, allowing them to converge correctly on the retina. This corrective lens prescription assists the eyes in focusing light rays and enables clear vision for close-up tasks. In some cases, individuals with mild hyperopia may not require corrective lenses unless they experience persistent symptoms or visual discomfort.

Etymology of LONG SIGHTEDNESS

The term "long-sightedness" is commonly used to describe a condition called "hypermetropia" in medical terminology. The etymology of the word "long-sightedness" can be understood by breaking it down into its two components:

1. "Long": In this context, "long" refers to objects that are located at a distance from the viewer. This usage of "long" as a metaphor for distance has been present in the English language since the 15th century.

2. "Sightedness": The word "sightedness" refers to the ability to see or perceive. It is derived from the term "sight", which originates from the Old English word "sihth" or "siht", meaning "act of seeing" or "power of seeing".

Similar spelling words for LONG SIGHTEDNESS

• one-sidedness,
• nearsightedness.