Crystal Optics is an optometrist at #02-07 Hougang Mall, 90 Hougang Ave 10, Hougang, Singapore, with a 4.7 rating on Google. A good eye exam goes well beyond reading letters off a chart: the optometrist also checks the health of the eyes, screening for conditions such as glaucoma that give no early warning, which is why a test every year or two makes sense even when vision seems fine. In Singapore, where myopia rates are among the highest in the world, children in particular benefit from regular checks, as short-sightedness often progresses quickly through the school years. Regulars bring their current glasses to appointments and ask for a written copy of their prescription, useful when comparing frames or ordering lenses later. Tucked into the shops at Hougang Mall, it makes an eye check a simple errand for anyone living or working around Hougang.