How Do You Spell MINUS LENS?

1. A minus lens is an ophthalmic lens, commonly used in eyeglasses, contact lenses, or other optical devices, that corrects nearsightedness or myopia. It is often referred to as a concave lens since it is thicker at the edges and thinner in the center, causing light rays entering the lens to diverge. This divergence compensates for the excessive focusing power of the eye, allowing the image to focus properly on the retina.

   The power of a minus lens is specified in diopters (D), indicating the amount of nearsightedness it corrects. Higher negative values indicate stronger prescriptions. For example, a lens with a power of -3.00D corrects more myopia than a lens with -1.00D.

   Minus lenses used in eyeglasses might be ground into a variety of shapes, including spherical or toric designs, depending on the individual's prescription and specific vision needs. These lenses are typically made from materials like glass or plastic and can be further enhanced with additional coatings to improve durability, scratch resistance, and reduce reflections.

   In contact lenses, minus lenses are typically soft lenses made from hydrogel or silicone hydrogel materials. These lenses sit directly on the cornea and provide the necessary correction without the need for frames.

   To obtain accurate prescriptions and properly fitted lenses, it is crucial for individuals to undergo regular eye examinations by qualified eye care professionals.

2. A concave or reducing l.

   A practical medical dictionary. By Stedman, Thomas Lathrop. Published 1920.

Common Misspellings for MINUS LENS

The term "minus lens" has its etymology rooted in Latin and English.

The word "minus" comes from the Latin word "minus", which means "less" or "smaller". It is often used to indicate a negative value or a subtraction in mathematics.

The term "lens" derives from the Middle English word "lense", which originally meant "a piece of glass used to help in seeing". The word "lens" itself can be traced back to the Latin word "lentilis", meaning "lentil", due to the lentil-like shape of certain lenses.

In the context of vision correction, "minus lens" refers to a concave lens that is used to correct nearsightedness (myopia). It is called a "minus lens" because it has a negative optical power, which diverges light and helps bring distant objects into focus for someone with nearsightedness.