The person who develops a piece of software is the worst person to test it. This sounds like a contradictory statement — but it's true. Because the developer already knows every flow, knows why to click every button, knows what an error means when it appears. The user knows none of these things.
Developer Blindness
When testing your own product, you say "this works" — but in reality it only works the way you already know. Someone who tries entering in a different order, someone who enters unexpected data, someone who opens the page on mobile, might be experiencing something completely different.
I call this "developer blindness." The mental model you build while writing the code blinds you to real usage scenarios.
What Does It Mean to Look Through the User's Eyes?
The user is seeing the system for the first time. They haven't read guiding text or watched a demo. They came directly to the page and need to decide what to do. At this point, the product itself has to do the talking.
Testing through the user's eyes means asking these questions: Where does someone look when they arrive at this page for the first time? What is the first thing they'll do? How do they feel when they get an error? Can they skip a step? What do they need to be able to continue?
Practical Methods
Test your own product after taking a few days away. When the mental model fades a little, you see more realistically. Show it to someone without technical knowledge — without explaining anything. Just watch. Where do they pause, where do they misunderstand? These moments are golden.
Pay special attention to error messages. A message that just says "An error occurred" tells the user nothing. What happened, why did it happen, what should they do? The answers to these should be inside the message.
Empathy Is a Technical Skill
In the software world, the word empathy is sometimes taken lightly. Yet being able to understand the user's perspective is as critical a skill as making a good architectural decision. Because the best code is useless if it's inside a product that nobody uses.
Testing software through the user's eyes is a matter of habit. In every development cycle, try to step out of being yourself and become someone seeing your product for the first time. That perspective will make you a better developer every single time.