Screens are part of nearly every day, so it is easy to stop noticing them. After a crash, though, many people find that the phone, laptop or tablet starts to feel different. The glow seems harder on the eyes, the words blur sooner, and the head begins to ache somewhere between the second and third hour of reading. That pattern is worth recording. This article explains how to keep a plain screen note for the week before your visit to a clinic in the St. Louis area. It is educational only and is not a diagnosis of anything.
What to write down
Keep a notebook or a note on your phone. Each time you use a screen for more than a few minutes, write the date, the start time, the end time and the device. Then add three short details: how bright the screen was, how far it sat from your face, and whether the room lights were on or off. If you do not know the brightness setting, write unsure and move on. A rough entry is more useful than a missing one.
Next, record what happened afterward. Did a headache start during the session, or later that evening? Did your eyes feel dry, heavy or watery? Did the letters seem to swim or double? Write what you noticed in your own words, such as a band behind the eyes or pressure over one brow. Your examiner can ask follow-up questions from there, and your own wording often tells them more than a checklist would.
Brightness and distance
Most devices offer an automatic brightness setting, a night mode and a text size control. Note which of these you used and whether you changed anything during the week. Adjusting settings can be a useful experiment, but keep the log honest. Write down the change, the date and what you observed afterward. Avoid changing several things at once, or you will not know which one made a difference.
Distance matters as well. A phone held close to the face places the eyes and neck in a different position than a laptop set at arm's length. If you usually read in bed, note the pillow height and whether the screen sat above or below eye level. Keep the focus on the eyes and the visual load, since you may already be tracking other posture details elsewhere.
Reading time and breaks
Long reading sessions are easy to underestimate. Write down the longest single stretch you read or scrolled without stopping, and whether you took a break at all. Also note how often you looked up at something far away. Some people find that short, regular pauses change how the week feels, but whether and how to change your habits is a question to raise with a clinician rather than decide alone.
Pay attention to the type of work you do on screens. Spreadsheets, long messages, video calls and small print each ask different things of the eyes. A single line such as two hours of spreadsheet in a dim room, headache by six, can tell a clearer story than a general sense of being tired. Over several days, these lines often show a pattern that memory smooths over.
Bringing the note to your visit
Bring the log even if it looks messy. Put the most recent week first and mark the entries that match a headache. Include anything you changed, such as a new glasses prescription, a different device or a new reading habit. If you wear glasses or contacts, note when you last had your eyes checked, and leave the date blank if you are not sure rather than guessing.
Your examiner decides what the notes mean. A screen log cannot explain why a headache happened, and it cannot rule out any condition. What it can do is give the visit a clear starting point, so less time goes to reconstructing the week and more goes to the questions that matter for you. Bring a short list of anything you want to ask, and keep it next to the log.
If you notice sudden vision loss or double vision that does not clear, weakness, confusion, trouble speaking, or the worst headache you have ever had, do not wait to write things down. Those signs call for urgent care right away.