Thirteen hours by touch – inside one of the world's longest exam days

Every November, South Korea comes to a standstill for its infamous college entrance exam.

Shops are shut, flights are delayed to reduce noise, and even the rhythm of the morning commute slows down for the students.

By late afternoon, most test-takers walk out of school gates, exhaling with relief and embracing the family members waiting outside.

But not everyone finishes at that hour. Even once darkness has fully settled and night has set in, some students are still in the exam room - finishing close to 10pm.

They are the blind students, who often spend more than 12 hours taking the longest version of the Suneung.

On Thursday, more than 550,000 students across the country will sit for the Suneung - an abbreviation for College Scholastic Ability Test (CSAT) in Korean. It is the highest number of applicants in seven years.

The test not only dictates whether people will be able to go to university, but can affect their job prospects, income, where they will live and even future relationships.

Depending on their subject choices, students answer roughly 200 questions across Korean, mathematics, English, social or natural sciences, an additional foreign language, and Hanja (classical Chinese characters used in Korean).

For most students, it is an eight-hour marathon of back-to-back exams. They begin the Suneung test at 08:40 and finish around 17:40.

Blind students with severe visual impairments, however, are given 1.7 times the standard testing duration.

This means that if they take the additional foreign language section, the exam can finish as late as 21:48 - nearly 13 hours after it began.

There is no dinner break; the exam continues straight through.

The physical bulk of the braille test papers also contributes to the length.

When every sentence, symbol and diagram is converted into braille, each test booklet becomes six to nine times thicker than the standard equivalent.

Dong-hyun said the Korean language section is particularly difficult for him.

A standard test booklet for that section is about 16 pages - but the braille version is roughly 100 pages long.

Even with screen-reading software, spoken information disappears as soon as it is heard, unlike text that can be seen and re-read. Dong-hyun has to hold the details in his memory as he goes.

The mathematics section is no easier.

He must interpret complex graphs and tables that have been converted into braille, using only his fingertips.

Still, he noted that things are better than they used to be. In the past, students had to do almost all calculations in their heads. But since 2016, blind test-takers have been allowed to use a braille notetaker, known as Hansone.

"Just like sighted students write out their calculations in pencil, we enter them in braille on the Hansone to follow the steps," he said.

Another student at Hanbit School for the Blind, 18-year-old Oh Jeong-won, who will also sit the Suneung this year, said the late afternoon is "the hardest point" of the day.

"Up until lunch, it's manageable," he said. "But around 4 or 5pm, after English and before Korean History, that's when it gets really tough.

"There's no dinner break," he explained. "We're solving problems during the time we would normally eat, so it feels even more exhausting. Still, I keep going because I know there will be a sense of accomplishment at the end."

For Jeong-won, the fatigue is compounded by the need to stay intensely focused with both his hands and his hearing.

"When I'm reading the braille with my fingers and also taking in information through audio, it feels much more tiring than it does for sighted students," he said.

But the students say that the length of the exam and the long study hours are not the hardest part. What is most challenging is access to study materials.

Popular textbooks and online lectures that sighted students rely on are often out of reach.

There are very few braille versions, and converting materials into audio requires having text files - which are difficult to obtain. In many cases, someone has to manually type out entire workbooks to make them usable.

Online lectures also pose difficulties, as many instructors explain concepts using visual notes, diagrams and graphics on screen, which cannot be followed through audio alone.

For these students, the Suneung is not just a college entrance exam - it's proof of the years they have endured to get where they are.

Jeong-won described the exam as "perseverance."

"There's almost nothing you can do in life without perseverance," he said. "I think this time is a process of training my will."

Their teacher, Kang Seok-ju, watches students go through the exam every year - and said the blind students' endurance is "remarkable".

"Reading braille means tracing raised dots with your fingertips. The constant friction can make their hands quite sore," he pointed out. "But they do it for hours."

Mr Kang urged his students to value completion rather than regret.

"This exam is where you pour everything you've learned since the first grade into a single day," he said. "Many students feel disappointed afterwards, but I just want them to leave knowing they did what they could.

"The exam is not everything."