Glasses hinges Glasses hinges – The small joints connecting the frame front to the temples (arms) of the glasses. They allow the glasses to fold and unfold. High-quality hinges contribute to the durability and comfort of your glasses, making them more resilient to wear and tear.
Category Archives: Glossary
Glasses cylinder
Glasses cylinder Glasses cylinder – The cylinder (CYL) value indicates the amount of lens power needed to correct the uneven curvature of the cornea. The CYL power can be written in + or – Cyl. The CYL power will always have an axis direction. This value is combined with the axis to properly align the …
Glasses axis
Glasses axis Glasses axis – A component of an eyeglass prescription for astigmatism, the axis is a number between 0 and 180 degrees that specifies the orientation of the cylinder correction. It ensures that the lenses are positioned correctly to compensate for the irregular shape of the cornea, helping to provide clear vision.
Eye floaters
Eye floaters Eye floaters – Small, shadowy shapes that appear in your field of vision, often described as spots, threads, or cobwebs. Floaters are usually harmless and result from the breaking down of the vitreous humour, the gel-like substance inside the eye, which occurs naturally with age. However, a sudden increase in floaters, especially when …
Lazy eye (Amblyopia)
Lazy eye (Amblyopia) Lazy eye (Amblyopia) – Also called a lazy eye, this is a disorder of sight in which the brain fails to fully process vision from one eye, over time the brain will ignore this eye and will favour the other eye. This can result in poor depth perception and visual clarity. Early …
Dry eyes
Dry eyes Dry eyes – A condition where the eye may not produce enough tears or the tears produced are of poor quality, leading to irritation, redness and a gritty feeling. Dry eyes can be caused by various factors, such as tear evaporation, poor blinking and blocked meibomian glands. Risk factors include aging, certain medications, …
Driving glasses
Driving glasses Driving glasses are glasses/ lenses may incorporate an anti-reflective coating that eliminates the glare from street lights or headlights, helping drivers by reducing the risk of being blinded by light. They’re often worn at night, but driving sunglasses also exist.
Diopter
Diopter Diopter (D) – A unit of measurement used to measure the power of a lens, indicating its ability to bend light. Diopters is the measurement used to record nearsightedness, farsightedness and astigmatism. For instance, a lens with a -2.00 diopter is used to correct myopia, meaning it helps focus distant objects more clearly.
Corneal ulcer
Corneal ulcer Corneal ulcer – A serious eye condition that affects the cornea, usually due to infection from bacteria, viruses, fungi, or parasites. Symptoms include severe pain, redness, discharge and blurred vision. Corneal ulcers require prompt medical treatment to prevent permanent vision loss.
Corneal abrasion
Corneal abrasion Corneal abrasion – A scratch or injury to the cornea, the eye’s clear, protective layer. Symptoms include pain, redness, watery eyes or increased tearing and sensitivity to light. While some corneal abrasions heal on their own, more often they need additional eyedrops to speed up the cell regeneration. They can also sometimes lead …