Guide
High myopia: thinner, lighter lenses
High myopia is usually considered to start at around −6.00 dioptres. With prescriptions like this, the lens you choose makes a big difference to how your glasses turn out: their thickness, their weight and how your eyes look through them.
By Ópticas del Sur · Published on
What changes with a strong prescription
For short-sightedness, lenses are thinner in the centre and thicker at the edges. The stronger the prescription, the more noticeable this is: the edges get thicker, the glasses get heavier and, from the outside, your eyes can look smaller.
The key: the refractive index
The index tells you how much the lens material bends light. With a higher index, the lens needs less thickness to correct the same prescription, so it ends up thinner and lighter.
For low and medium prescriptions we stock 1.5 and 1.6 index lenses (which to choose). For high myopia we choose a higher index to suit your prescription: [[PENDIENTE: qué índices altos se ofrecen (¿1.67? ¿1.74?)]].
The frame matters too
With a strong prescription, a moderately sized frame that is well centred on your eyes is best: the smaller the lens, the less the thick edges show.
Brands and timescales
For high myopia we work with lenses from Indo, Essilor, Kodak and BBGR. Delivery time: [[PENDIENTE: plazo de entrega de las lentes de alto índice]].