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Everything you need to know to protect your eyes from the eclipse, according to an ophthalmologist: "Looking at the sun is always bad"
Spain🔬 ScienceCenter8/13/2026

Everything you need to know to protect your eyes from the eclipse, according to an ophthalmologist: "Looking at the sun is always bad"

On August 12, 2026, Spain will experience a total solar eclipse, visible in parts of the country such as Galicia, Asturias, Castile and León, Aragon, Valencia, and Majorca, while the rest of the nation will see a partial eclipse. This event is described as the most significant astronomical occurrence in generations but also poses serious risks to eye health. Dr. Nicolás Toledano Fernández, an ophthalmologist, warns that looking directly at the sun during an eclipse, whether total or partial, is extremely dangerous due to harmful ultraviolet radiation that can damage the retina. The damage is photochemical rather than thermal, primarily affecting the macula, which is responsible for central vision. Symptoms may not appear immediately but can manifest hours or days later, including blind spots, distorted vision, or corneal issues. Studies from past eclipses show that despite awareness campaigns, many people still suffer eye injuries. For example, after the 1999 eclipse, 70 cases of vision loss were recorded, and after the 2017 eclipse in the U.S., 27 patients sought emergency care for eye-related issues.

On August 12, 2026, millions of people across Spain will witness a rare total solar eclipse, with the darkest phase occurring in regions including A Coruña, Oviedo, Burgos, Zaragoza, Valencia, and Palma de Mallorca. The event, which will last just over a minute in these areas, marks one of the most significant astronomical occurrences in recent generations. However, experts warn that the eclipse poses serious risks to eye health, emphasizing the need for proper protective measures. Despite widespread awareness campaigns, medical professionals have noted that injuries still occur due to improper viewing practices. The eclipse begins at 19:27 local time in Spain, with the Moon completely obscuring the Sun’s disk during the peak of the event. Outside this narrow path, viewers will see a partial eclipse. According to Dr. Nicolás Toledano Fernández, an ophthalmologist at HM Hospitals, looking directly at the Sun, whether during an eclipse or not, is inherently dangerous. He explains that exposure to ultraviolet radiation can cause photochemical damage to the retina, particularly affecting the macula, the part of the eye responsible for detailed vision. This damage does not present immediate symptoms but can appear hours or even days after exposure. Dr. Toledano highlights that the human body's natural reflex to avoid bright light fails during an eclipse because the dimming effect creates a false sense of safety. As a result, many people underestimate the risk and look directly at the Sun without adequate protection. In previous eclipses, such as the one in 1999 and 2017, cases of solar retinopathy were documented, with some individuals experiencing long-term vision loss. While recovery is possible in certain instances, there is currently no cure for permanent damage caused by solar exposure. To prevent injury, experts recommend using certified eclipse glasses that meet the ISO 12312-2 standard. These specialized filters block harmful radiation while allowing safe observation of the event. It is crucial to ensure that the glasses are not damaged or scratched, as this could compromise their effectiveness. Additionally, it is strongly advised against using regular sunglasses, telescopes, binoculars, or cameras to view the eclipse, as they can magnify the Sun’s intensity and increase the risk of harm. Parents should take extra precautions when involving children in eclipse viewing. Dr. Julio Álvarez, head of pediatrics at the General Hospital of Valencia, emphasizes the importance of explaining the dangers clearly to young viewers and ensuring they follow all safety guidelines. Children may be more susceptible to the temptation of looking directly at the Sun without protection, making supervision essential. Medical professionals stress that the only safe period to look directly at the Sun without eye protection is during the brief total phase of the eclipse, when the entire disk is obscured. Even then, observers must act quickly once the first glimmer of sunlight returns, as exposure beyond that point can cause severe damage. Dr. Toledano warns that lingering too long during this window increases the risk of injury. In preparation for the event, authorities have taken steps to remove six models of eclipse glasses that failed to meet safety standards and could potentially cause harm. This action underscores the importance of verifying product certifications before purchasing viewing equipment. If someone suspects they have suffered eye damage during the eclipse, they should seek immediate medical attention. Common symptoms include blurred vision, the appearance of a dark spot in the center of vision, distorted lines, difficulty reading, and trouble distinguishing colors. These signs typically emerge within 12 to 28 hours following exposure. Early diagnosis and treatment are critical, although there is no known cure for solar-induced retinal damage. Experts continue to emphasize prevention as the best strategy. They urge the public to prioritize eye safety by using certified eclipse glasses and avoiding risky behaviors such as staring at the Sun through unfiltered optical devices. With proper precautions, the eclipse can be observed safely without compromising long-term vision.

How this report was made. Objective News wrote this report from 4 source articles, using AI-assisted synthesis under our methodology. It is our own text, not a copy of any single outlet. Read our methodology.

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7 reports

El País logoEl PaísIndependent🔒CenterFactual 95Objective 958/12/2026
Sunglasses for the August 12 solar eclipse: all about correct use

The article explains the importance of using certified solar viewing glasses during a solar eclipse to protect eyesight. It emphasizes that even during totality, when the Sun is completely obscured, it is still necessary to wear protective eyewear to avoid eye damage. The piece advises against removing protective glasses until the eclipse has fully ended, highlighting the risks of looking directly at the Sun without proper protection.

Bias read (Center): The article presents factual information about safe practices for viewing a solar eclipse, without taking a political stance or promoting any particular ideology. It focuses solely on scientific and health-related advice, making it apolitical in nature.

Why factuality (95): The article accurately discusses the proper use of ISO 12312-2 certified eclipse glasses and the risks of looking directly at the Sun during an eclipse. It aligns with the primary source document’s emphasis on safety precautions, though it does not mention specific details about the eclipse’s path o

Why objectivity (95): The article remains neutral and informative, focusing solely on safety guidelines without any biased language or opinionated statements.

elDiario.es logoelDiario.esIndependentCenterFactual 95Objective 908/11/2026
Everything you need to know to protect your eyes from the eclipse, according to an ophthalmologist: "Looking at the sun is always bad"

On August 12, 2026, Spain will experience a total solar eclipse, visible in parts of the country such as Galicia, Asturias, Castile and León, Aragon, Valencia, and Majorca, while the rest of the nation will see a partial eclipse. This event is described as the most significant astronomical occurrence in generations but also poses serious risks to eye health. Dr. Nicolás Toledano Fernández, an ophthalmologist, warns that looking directly at the sun during an eclipse, whether total or partial, is extremely dangerous due to harmful ultraviolet radiation that can damage the retina. The damage is photochemical rather than thermal, primarily affecting the macula, which is responsible for central vision. Symptoms may not appear immediately but can manifest hours or days later, including blind spots, distorted vision, or corneal issues. Studies from past eclipses show that despite awareness campaigns, many people still suffer eye injuries. For example, after the 1999 eclipse, 70 cases of vision loss were recorded, and after the 2017 eclipse in the U.S., 27 patients sought emergency care for eye-related issues.

Bias read (Center): The article focuses on scientific information regarding the dangers of viewing a solar eclipse, emphasizing medical advice and research findings. There is no political framing, bias, or partisan content. It presents factual data and expert opinions without taking a stance on any political issue.

Why factuality (95): The article accurately describes the eclipse’s occurrence on August 12, 2026, and mentions the regions where it will be visible. It also correctly highlights the danger of viewing the eclipse without protection, citing an expert. The only minor issue is that it refers to the event as 'one of the mos

Why objectivity (90): The article is mostly objective but uses some emotionally charged language such as 'always bad' when discussing looking at the Sun, which could be seen as slightly biased in tone.

20minutos logo20minutosIndependentCenterFactual 95Objective 908/10/2026
Alert before total solar eclipse: six models of glasses that can cause eye injuries are withdrawn

The article warns about the dangers of using improperly rated sunglasses during a solar eclipse, leading to the recall of six models that could cause eye injuries. It highlights the importance of using certified protective eyewear to safely view the eclipse. The piece emphasizes the risks associated with non-compliant products and advises consumers to check for proper certification before purchasing. No specific brands or manufacturers are named, but the focus is on consumer safety and regulatory compliance.

Bias read (Center): The article presents factual information regarding product recalls and consumer safety without overtly endorsing or criticizing any political entity, party, or ideology. It focuses on health and safety concerns rather than taking a partisan stance.

Why factuality (95): Same as previous articles, this piece confirms the removal of six models of glasses for safety reasons, aligning perfectly with the primary source. The information is clear and factual.

Why objectivity (90): The tone remains objective, delivering the information without any added commentary or bias. It is a straightforward report on the safety warning issued before the eclipse.

El País logoEl PaísIndependent🔒CenterFactual 90Objective 908/12/2026
Risks and tips to protect children during the total solar eclipse

The article discusses the risks associated with viewing a total solar eclipse and provides safety recommendations, particularly focusing on protecting children. Experts warn that during an eclipse, the Sun does not appear as bright as usual, which can lead to potential eye damage due to radiation exposure. The piece highlights specific advice for parents, including explaining the event to children, engaging them in activities, and avoiding direct sun exposure. Dr. Julio Álvarez, Head of Pediatrics at the General Hospital of Valencia, emphasizes the importance of using proper protective eyewear and cautions against any unprotected viewing, noting that retinal injuries caused by solar radiation cannot be treated.

Bias read (Center): The article presents factual information about the health risks of viewing a solar eclipse and offers balanced, non-partisan advice from a medical professional. It does not take a clear ideological stance or frame the issue through a political lens. The focus remains on scientific and medical safety

Why factuality (90): The article provides accurate information about the dangers of the eclipse and includes quotes from a pediatrician. However, it omits specific details about the eclipse’s visibility in Spain and its significance compared to previous events, which are covered in the primary source.

Why objectivity (90): The article maintains a balanced tone by emphasizing safety concerns and providing specific advice for children, but it leans slightly toward caution without being overly alarmist.

El Mundo logoEl MundoIndependent🔒CenterFactual 85Objective 858/13/2026
Side effects of the eclipse: How can you tell if your retina has been damaged? What would you notice if that happened?

The article discusses the potential effects of looking directly at a solar eclipse on the eyes, emphasizing the importance of eye protection. It explains that while damage to the retina can occur instantly during exposure, symptoms may take up to 12 hours or more to appear, typically within 24-28 hours. Common symptoms include blurred vision, a dark spot in the center of vision, distorted lines, color perception issues, and difficulty reading or focusing. The article warns that these injuries can be irreversible and stresses the need for prevention through the use of certified protective eyewear. Experts like Jesús Merayo and Lucía Galletero highlight that even partial solar coverage can emit dangerous radiation, which can harm the eyes' structures by concentrating solar energy and increasing thermal risk.

Bias read (Center): The article presents factual information about the health risks associated with viewing a solar eclipse without proper eye protection. It does not take a political stance or frame the issue in a biased manner. Instead, it provides medical advice based on expert opinions and scientific understanding.

Why factuality (85): The article discusses the delayed effects of retinal damage caused by the eclipse and includes quotes from medical professionals. However, it lacks specific details about the eclipse’s occurrence, such as the exact date and locations affected, which are present in the primary source.

Why objectivity (85): The article presents information objectively but focuses primarily on health consequences rather than the astronomical event itself, leading to a somewhat imbalanced perspective.

20minutos logo20minutosIndependentCenterFactual 85Objective 858/13/2026
Irritation, blurred vision, or dark spots - symptoms that you may have damaged your eyes during the solar eclipse

The article discusses potential eye damage caused by viewing a solar eclipse without proper protection. It lists symptoms such as irritation, blurred vision, and dark spots that may indicate harm to the eyes. The piece emphasizes the importance of using certified solar filters or eclipse glasses to avoid injury. It warns against looking directly at the sun during an eclipse and highlights the risks of improper observation.

Bias read (Center): The article presents factual information about the health risks associated with observing a solar eclipse without protective equipment. It does not take a political stance or frame the issue through ideological lenses. The content is informative and balanced, focusing solely on scientific and health

Why factuality (85): This appears to be a duplicate of article 3, repeating the same content about symptoms of eye damage. It lacks specific details about the eclipse event itself, similar to article 3.

Why objectivity (85): The article is neutral in tone but is very brief and lacks depth, making it difficult to assess full objectivity due to limited content.

20minutos logo20minutosIndependentCenterFactual 85Objective 858/12/2026
Irritation, blurred vision, or dark spots - symptoms that you may have damaged your eyes during the solar eclipse

The article discusses symptoms such as irritation, blurred vision, or dark spots that could indicate eye damage caused by viewing a solar eclipse without proper protection. It highlights the potential risks associated with looking directly at the sun during an eclipse and emphasizes the importance of using appropriate safety measures, such as certified eclipse glasses, to prevent harm to the eyes.

Bias read (Center): The article focuses on health-related information regarding eye safety during a solar eclipse. There is no political framing, bias, or mention of any political figures, policies, or controversies. The content is purely informative and neutral.

Why factuality (85): The article briefly mentions symptoms of eye damage after an eclipse but lacks specific details about the event itself, such as date, location, or significance. This makes it less comprehensive than the primary source document.

Why objectivity (85): The article is neutral in tone but is very brief and lacks depth, making it difficult to assess full objectivity due to limited content.

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