Eye Doctors Warn Cork Not to Look Directly at Wednesday's Solar Eclipse

Cork will get one of the best views in Ireland of Wednesday's deep partial solar eclipse, but eye specialists are warning that there is no safe moment during the event to look at the Sun without certified protection.

The Irish College of Ophthalmologists, the professional body for medical and surgical eye doctors in Ireland, issued guidance on 10 August 2026 ahead of what it describes as the most prominent solar eclipse visible from Ireland in 27 years.

According to MTU Blackrock Castle Observatory, the eclipse will begin at 6.15pm on Wednesday 12 August 2026, reach maximum at 7.13pm and end at 8.08pm. Around 96 per cent of the Sun will be covered as seen from Cork, and the observatory says it will be the largest eclipse visible from Ireland until 2090.

Because Ireland lies outside the path of totality, a sliver of the Sun remains visible at all times. That is the central safety point: protection must stay on for the entire event.

Irish College of Ophthalmologists:

"A solar eclipse is a rare and special occasion for people to enjoy but it is also potentially very harmful to your eyes if viewed directly."

The College advises against looking directly at the Sun with the naked eye or with sunglasses on, saying sunglasses do not offer sufficient protection. It also warns against watching through a telescope, binoculars, a camera or a camera-phone, noting that even lining up the projection puts a person at risk.

It specifically advises against attempting a selfie on a camera-phone, saying that glancing at the Sun even briefly can lead to damage of the retina. Smoked glass, stacked sunglasses, polarised shades and photographic filters are all listed as unsuitable.

The safe options set out by the College are certified eclipse glasses, indirect viewing using a home-made pinhole projection with your back to the Sun, attending an organised viewing event run by astronomers with specially adapted telescopes, or watching one of the livestreams, including a broadcast by the European Space Agency.

On eclipse glasses, the College advises checking for pinholes by holding them up to a light before use, and discarding any pair with scratches. The American Astronomical Society has separately cautioned that an ISO 12312-2 marking printed on a product is not in itself proof that it meets the standard, and that the standard requires the manufacturer's name and address to appear on the filter or its packaging.

The College is particularly firm on children.

Irish College of Ophthalmologists:

"Children should not be allowed to look directly at the sun at any time. The potential damage is usually more severe because the child's natural lens is so clear that it lets more ultraviolet (UV) rays reach the back of the eye."

Ophthalmologists have treated patients after previous eclipses who presented with solar burns to the retina or macula, a condition known as solar retinopathy or solar maculopathy. Staring directly at the Sun can permanently scar the retina, the area at the back of the eye responsible for vision.

Irish College of Ophthalmologists:

"Solar burns to the retina are not painful and the loss of vision is not always immediate but if damage is done, it is unfortunately irreversible."

Anyone who notices a change in their vision after viewing the eclipse should contact their GP or an eye doctor.

In Cork, MTU Blackrock Castle Observatory has distributed around 7,000 eclipse glasses, with a further 500 to be shared at its public viewing locations. Anyone still without a certified pair should not assume glasses will be available on the night.

Free public viewing events are taking place at MTU Blackrock Castle Observatory, Tramore Valley Park and Bell's Field from 6pm to 8.30pm, in collaboration with Cork City Council's Night Time Economy initiative. No booking is required and a team of ambassadors will be on hand to answer questions.

The observatory also publishes instructions for making a pinhole camera and box projector at bco.ie, a method that allows the progress of the eclipse to be followed without any risk to eyesight.

Cloud may be a factor. The Met Éireann Munster forecast issued at 5.30am on 11 August 2026 says of Wednesday:

"Cloudy tomorrow with some patchy light rain or drizzle possible. Some sunny spells possible further east. Highest temperatures of 20 to 27 degrees, coolest in the southwest, in a light southerly breeze."

MTU Blackrock Castle Observatory notes that an eclipse can still be viewed through thin cloud, so a grey sky is not necessarily the end of the matter. Even so, a break in cloud can let the Sun's full intensity through without warning, so eclipse glasses should stay on whenever any part of the Sun could become visible.

Further safety guidance is available from the Irish College of Ophthalmologists at eyedoctors.ie and from Astronomy Ireland at astronomy.ie.