How To Find Out Your Glasses Prescription From Your Contacts

Both contact lenses and glasses correct common refractive errors such as myopia (curt-sightedness), hyperopia (long-sightedness), astigmatism which requires toric contact lenses and presbyopia which requires multifocal contact lenses. Although your contact lens and spectacles prescription may wait similar, it does not hateful they will give you the aforementioned visual acuity if y'all effort to catechumen ane to the other.

Are spectacles prescriptions and contact lens prescriptions the same?

A glasses prescription is not the same as a contact lens prescription. Glasses sit slightly away from your eyes and contact lenses sit straight over your eye, then two dissimilar tests and measurements are required. Depending on the refractive mistake, the force of lens required to correct it and the blazon of contact lens you demand, the parameters specified on your glasses prescription may be significantly different from those on your contact lenses prescription.

Yous may also find that there will exist a cylinder and axis value on your glasses prescription, whilst it won't be prescribed for your contact lenses.

Glasses prescription vs contact lens prescription

Glasses prescription

Contact lens prescription
contact lenses prescription

Note: The glasses prescription (left) and the contact lens prescription (right) above are just samples. Yours may differ but should comprise the same data.

Glasses prescription vs contact lens prescription

Notation: not everything shown on the above tabular array volition necessarily be included on your prescription. The in a higher place is but an example of what could be found on your prescription and what will not be found on your prescription depending on whether you wear contact lenses or glasses.

Contact lenses prescriptions include certain specifications that are not part of a glasses prescription, these include:

Base of operations curve: the base curve measures the curvature of the lens; it is determined by the bodily shape of your centre and produces the right lens plumbing fixtures.

Diameter: the lens diameter specifies the overall size of the lens. Forth with the base curve, this determines how the lens fits on the eye.

Lens fabric: in days gone past, spectacles were fabricated from actual glass, present, most spectacles are made of a lightweight plastic. Contact lenses on the other hand, are made from a range of hydrogels. These are split into hydrogel or silicone hydrogel contacts. How each lens fits and feels depends on each private wearer's eyes. Those with sensitive or dry eyes generally practise better with silicone hydrogel contact lenses every bit they allow a greater level of oxygen and hydration into the eye.

Brand/manufacturer: most contact lens prescriptions volition include the brand name or manufacturer of the lenses for when you need to reorder them in the futurity.

A glasses prescription contains a sphere indicating the lens power, a cylinder indicating strength of whatever astigmatism (if there is one stated) and an axis showing the orientation of the cylinder. Multifocal lenses require an 'add' which indicates boosted positive power that enable the eyes to focus for shut work.

A contact lens prescription may as well include an axis and cylinder if it is a toric lens for astigmatism, or an add together if it is a multifocal lens, these are the only two measurements that can be constitute on both contact lenses and glasses prescriptions.

You lot'll observe that the cylinder number on a contact lens prescription is always a minus number. This indicates the extra power y'all need for astigmatism correction. A college number denotes a more than severe level of astigmatism. The cylinder value for a glasses prescription on the other mitt can be a plus or minus. You won't take any value's in this column on your prescription if you don't have astigmatism.

glasses and prescription

Can you convert glasses prescription to contact lenses?

No – yous cannot direct catechumen a spectacles prescription to a contact lens prescription. Equally, you lot cannot convert a contact lens prescription to a spectacles prescription.

Tin I use my glasses prescription for contact lenses?

The uncomplicated answer to this question is no – you lot cannot and should non utilise your spectacles prescription to effort to calculate your contact lens prescription. It should besides exist noted that non anybody who needs glasses can also wear contact lenses, information technology is of import that you are examined separately. Some people take sensitive corneas or other heart related complications and will simply never be able to adapt to wearing lenses.

How tin can I order glasses and contact lenses online?

You tin can order contact lenses online, but you must have a valid prescription from an optician. In one case y'all have your prescription, you may order you lenses anywhere y'all like and information technology is cheaper to order your contact lenses online.

You lot can order your glasses online from Feel Good Contacts merely past choosing your lens type and and so entering your prescription. If you lot have already placed an guild with usa before, you will not need to enter your prescription once again unless it has expired.

It is illegal for your optician to withhold your contact lens or glasses prescription from yous.