Ophthalmologist warns screen time strains eyes, urges 20-20-20 rule

Two hours of screen time during an eight-hour workday is enough to trigger negative visual effects, according to the Consejo General de Colegios de Ópticos-Optometristas, citing an observational study of 1,080 workers. Symptoms include dry eyes, headaches, blurred vision, and difficulty sleeping. The study also reports that eyeglass use has risen from 50% to 62% over the past five years Source: Clarín Source: La Vanguardia.

Expert advice

Ophthalmologist Javier Hurtado explains that computer vision syndrome causes tired, dry eyes and headaches but not vision loss. He notes that presbyopia, or age-related farsightedness, becomes inevitable after 45. To mitigate strain, he recommends blinking more often and following the 20-20-20 rule: every 20 minutes, look at something 20 feet away for 20 seconds Source: La Vanguardia.

Workplace impact

Beyond individual discomfort, the opticians' council warns that these eye issues can slow work pace and reduce company productivity. Hurtado emphasizes that adapting the workstation—controlling light, humidity, screen position, and brightness—is crucial. He also cautions against replacing computer screens with phone screens during breaks, as eyes need rest Source: Clarín.

Occupational differences

Hurtado illustrates how profession affects eye strain: a notary may need reading glasses all day, while a farmer only for occasional documents. He notes that prolonged near work increases myopia risk, especially in children, and that adults may start needing glasses after intense study or exam preparation Source: La Vanguardia.