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Yes. These plum fit-over glasses for light sensitivity are designed for people who need a fairly dark lens to reduce uncomfortable brightness and glare. NoIR Filter 81 has 19% visible light transmission, meaning it allows about 19% of visible light through. NoIR classifies Filter 81 as a plum medical filter and lists it for corneal pathology, diabetic retinopathy, glaucoma and migraines.
With 19% VLT, this is a dark plum lens that makes the most sense for:
A 19% VLT lens provides substantial light reduction without moving into the very darkest range.
For comparison, a 14% plum lens allows less light through and will feel darker. Filter 81 may make more sense for someone who wants a dark plum filter but does not want quite as much brightness reduction as a lower-VLT plum lens.
This gives shoppers another useful step between medium-tint lenses and very dark specialty filters.
Lens color affects more than how dark the glasses feel.
Gray primarily reduces overall brightness while keeping colors relatively neutral.
Yellow and amber are commonly chosen when increasing contrast is a major priority and generally create a warmer-looking view.
Plum gives the wearer a different color-filtering experience and is an option for people whose primary concern is light sensitivity, glare and visual comfort. NoIR specifically offers Filter 81 as a 19% VLT plum medical filter.
Individual responses to tinted lenses vary, so one lens color will not be the best choice for everyone.
Yes. These are fit-over glasses designed to be worn over corrective eyewear, although they may also be worn by themselves.
The fit-over design provides additional coverage around your regular glasses, including side protection that can help reduce light entering around the lenses. NoIR describes its fit-over frames as comfortable over prescription glasses and providing side shields for a wider field of view.
Measure the overall width and height of the prescription glasses you plan to wear underneath. Choose a fit-over frame that is slightly larger so your regular glasses can sit comfortably inside.
| Option | Overall Frame W × H |
|---|---|
| Small – Removable Top Shield | 133 × 44 mm / 5.24 × 1.73 in. |
| Medium – Removable Top Shield | 142 × 44 mm / 5.59 × 1.73 in. |
| Large – Removable Top Shield | 143 × 46 mm / 5.63 × 1.81 in. |
| XL – Removable Top Shield | 148 × 49 mm / 5.83 × 1.93 in. |
| Frame Universal Large | 144 × 43 mm / 5.67 × 1.69 in. |
Fit Tip: Measure your prescription glasses before choosing a size and allow enough room for them to sit comfortably underneath.
Both frame choices use the same NoIR Filter 81 plum lens. The difference is the fit and frame design—not the filter performance.
The Removable Top Shield Fit-Over is available in Small, Medium, Large and XL and adds coverage across the upper portion of the frame.
The Universal Large Frame provides another fit-over shape for shoppers whose prescription glasses fit that frame better.
Choose based on the size and shape of the glasses you wear underneath and the type of coverage you prefer.
Yes. These sunglasses are helpful for corneal pathology, diabetic retinopathy, glaucoma and migraines.
Filter 81 does not treat these conditions; it is designed to help manage glare, brightness and light sensitivity.
Brand: NoIR
Filter: Filter 81 UVShield
Lens Color: Plum
Visible Light Transmission: 19%
Light Level: Dark
Primary Uses: Light sensitivity, glare reduction and brightness control
Frame Style: Fit-Over
Sizes: Small, Medium, Large and XL Removable Top Shield; Universal Large
Wear: Over corrective eyewear or alone
NoIR Listed Conditions: Corneal Pathology, Diabetic Retinopathy, Glaucoma, Migraines
$69.95



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