Sanpaku eyes refer to a particular eye condition in which the white part of the eye (the sclera) is visible above or below the iris, particularly when the person is looking straight ahead. The term “sanpaku” comes from Japanese, meaning “three whites,” which refers to the visible sclera showing both above and below the iris, making the eyes appear different from the typical appearance where only a small amount of the sclera is visible. This condition can occur due to various causes, including medical conditions, stress, or even just anatomical variations.
There are two types of sanpaku eyes: upward sanpaku and downward sanpaku. In upward sanpaku, the sclera is visible below the iris, while in downward sanpaku, the sclera is visible above the iris. Some people believe that upward sanpaku is associated with a person who is either under stress or emotionally unstable, whereas downward sanpaku is often linked to a person who may be in poor health or potentially prone to danger.

In terms of causes, sanpaku eyes can be linked to a range of factors. One of the most common reasons for upward sanpaku is the increased tension in the eye muscles, which can cause the eyes to tilt upward and reveal more of the sclera. Medical conditions like Horner’s syndrome, which affects the nerves controlling eye muscles, and other neurological disorders, can also result in this eye appearance. Downward sanpaku can occur due to various health issues, such as high blood pressure, fatigue, or even certain medications that cause the eyelids to droop.
How it's made
The unisex tshirt blank for adults this tee is based on is a Gildan 64000. Made with ethically grown and harvested ring-spun US cotton, this is a lightweight fabric (4.5 oz/yd² (153 g/m²)) in a modern unisex cut. The classic fit with the crew neckline deliver a clean, versatile style that can match any occasion, whether formal or semi-formal.
Shoulders are reinforced with twill tape, there are no side seams for a smoother fit, and the ribbed-knit collar helps prevent curling. All shirts feature a pearlized, tear-away label for total wearing comfort.
Solid colors are 100% cotton, while heathers and sport grey use polyester blends for added durability. Note that due to the fabric properties, the White color variant may appear slightly off-white rather than bright white. 2 year warranty in EU and Northern Ireland as per Directive 1999/44/EC.
Machine wash instructions: cold (max 30C or 90F), with similar colors, do not bleach. Tumble dry: low heat. Iron, steam or dry: low heat. Do not dryclean.
Size guide
| XS | S | M | L | XL | 2XL | 3XL | 4XL | 5XL | |
|---|---|---|---|---|---|---|---|---|---|
| Width, in | 16.00 | 18.00 | 20.00 | 22.00 | 24.00 | 26.00 | 28.00 | 30.00 | 32.00 |
| Length, in | 27.00 | 28.00 | 29.00 | 30.00 | 31.00 | 32.00 | 33.00 | 34.00 | 35.00 |
| Sleeve length, in | 7.99 | 8.23 | 8.50 | 8.74 | 9.02 | 9.25 | 9.49 | 9.72 | 9.96 |
| Size tolerance, in | 1.50 | 1.50 | 1.50 | 1.50 | 1.50 | 1.50 | 1.50 | 1.50 | 1.50 |







