How to protect our eyes from solar radiation

Medical content revised by - Last revision 01/07/2016
How to protect our eyes from solar radiation

During summer, we are more exposed to solar radiation than during the rest of the year seasons.  People is increasingly conscious of the need to protect their skin, but we must also bear in mind that our eyes need the same protection from solar radiation.

Solar radiation can cause damages in the eyes to a larger or smaller extent, depending on the intensity and time of exposure. Therefore, it is essential to protect our eyes from such radiation, especially when we plan to spend a great amount of time exposed to them.


Infrared radiation

Infrared rays can affect inner eye structures, such as the crystalline lens (cataract) and the retina. They also affect more external areas, such as the conjunctiva and the cornea.

Visible radiation

Solar radiation is made of broad spectrum electromagnetic waves that contain a fraction of radiation visible to human eye, that is the light, and another fraction which is invisible.

Ultraviolet radiation

These are the most harmful rays for the eyes. They specially affect populations located in equatorial regions or regions located at high altitudes, as it is the case of mountain regions, where the eyes are exposed to a higher amount of radiation, as the atmosphere provides lower protection. The ability that surfaces have to reflect the light is also essential. This ability is increased by an 18% on beach sand and by a 20% on water, when compared by a 5% reflected on the earth.

The moment of the day plays also an important role, as radiations are much higher during midday, due to their inclination.

There are three types of ultraviolet rays: UVA, UVB and UVC.

>UVA rays:

These are the rays responsible for skin tanning effect. Crystalline lens is the main eye element that absorbs them. They have not yet been proved to cause the onset of cataracts.

>UVB rays:

These are the most harmful rays to our health, and they are the ones most responsible for eye damages such as conjunctivitis and cataracts.

>UVC rays:

These rays are the most dangerous ones. Fortunately, the ozone layer prevents them from reaching the Earth and causing keratitis or cataracts.


In the conjunctiva, rays can cause several damages, going from irritating conjunctivitis to the onset of a pterygium, a prominent, highly vascularised membrane that invades the cornea and grows towards the pupillary axis, thus causing astigmatism and, sometimes, permanent scarring that endangers good vision.

In the cornea, rays cause superficial keratitis that can lead to photophobia (pain or intolerance to light) and a gritty feeling in the eyes.

In crystalline lenses, cataracts may be formed, and in the retina, scotomas caused by focal burns can lead to a substantial vision loss, in case they affect the central area, as it may be the case when watching an eclipse with no protection.


Eyes have their own solar radiation protection system, composed of eyelids, eyelashes, the cornea, and the crystalline lens, that block a large amount of dangerous radiation and only let a few rays in until the retina. Nonetheless, it is important to protect one’s eyes with sunglasses, in order to prevent light and invisible (infrared and ultraviolet) radiations from harming the eyes and the skin around them.

The fact that eyeglasses lenses are tinted does not guarantee that invisible radiation is prevented from going through them. Therefore, it is important to buy sunglasses in a specialist store that only sells glasses with appropriate filters able to completely protect us from such rays.

Post your comment

In accordance with the provisions of the General Data Protection Regulation (REGULATION (EU) 2016/679), the following information about the processing of personal data is disclosed to you.

Responsible: Institut Català de la Retina, S.L., Institut Català de Cirurgia refractiva, S.L. (from now on ICR)

Representative of Data Protection Contact: C/Pau Alcover nº 67 08017 Barcelona –

Aim: The purpose of the treatment is to manage the information you provide us and after having your consent, publish the testimonial on our website.

Legitimization: The legal basis for the present treatment is the request made by you and having your consent.

Recipients: The recipients of the information are the departments and delegations in which ICR is organized, in part or in its entirety. It will not be communicated to third parties.

Rights: At any time, you can exercise your rights of access, rectification, deletion, opposition, limitation of treatment and / or portability of data by writing to the RPD Representative of Data Protection at the address provided in contact. You can also revoke consents to other treatments. You can also request more information from the RPD about the treatments performed.
In the event that you consider that your rights have been violated, you can submit a claim to the competent Data Protection Control Authority.

For all purposes, the user accepts that the opinion expressed will be exclusively his /her responsibility. The user assumes under his / her exclusive responsibility the damages or harms that may derive from it.
ICR will not be responsible for the accuracy, quality, reliability, correctness, morality and legality of the data, information or opinions published by users.
ICR reserves the right not to publish all opinions of users.
The user is solely responsible of his /her username. ICR will not be responsible for the illegal use or for illicit purposes that other users can make of this user name.

Preservation: The collected data will be kept during the time required for the requested management, for at most 30 days.

ICR Ganduxer Headquarters

08022 Barcelona

ICR Pau Alcover

C. Pau Alcover 67
08017 Barcelona

ICR Terrassa

C. del Nord, 77
08221 Terrassa

Clínica Bonanova Surgical Center

Passeig Bonanova, 22
08022 Barcelona

Clinica Bonanova Tests and Treatments

c/ Mandri, 63
08022 Barcelona

ICR Service at Clínica Ntra. Sra. del Remei

c/ de l'Escorial,148
08024 Barcelona
This website uses cookies in order to collect statistical information regarding navigation. If you keep on surfing this website, it shall be deemed to have acknowledged its use. More information.