How to read OTRA blue‑light Product Detail Page specs (and what to compare)

Updated July 2026

Shopping blue‑light frames should feel effortless. This guide shows you exactly how to scan an OTRA Product Detail Page, what each spec means for comfort and clarity at a screen, and which details matter most when comparing styles across the Blue Light Collection in the U.S.

What specs matter when buying blue light glasses?

On an OTRA blue‑light Product Detail Page, four fields matter most: lens colour (confirms Blue Light tuning), lens category (most styles list Category 1 for indoor‑friendly clarity), UV protection (UV400, blocking UVA/UVB regardless of category), and frame measurements—width, height, and nose gap—which predict fit before you try on. Compare those numbers to a pair you already love, staying within 2–3 mm of frame width for a near‑identical feel, and you can shop with confidence.

What to look for on a blue light glasses product page

On any OTRA blue‑light product page, scroll to the details panel just below the photos. You’ll see a concise spec list with fields like frame colour, lens colour, lens category, and measurements such as frame width, frame height, and nose gap. For a collection‑level orientation before you deep‑dive a single page, start with Blue Light & Digital Life: OTRA’s complete style-and-comfort guide for work‑to‑weekend screen time.

What each spec means (and how to use it)

Lens colour: Blue Light

This confirms the lens is tuned for indoor, on‑screen comfort with a near‑clear appearance. For a plain‑language explainer of the filtering approach, see Blue‑light filtering basics: what OTRA filters and what it doesn’t.

Lens category: Category 1 for indoor clarity

Most OTRA blue‑light pages list Category 1 in the lens category field (some pages may present the field alongside the Blue Light callout). Category numbers describe visible‑light tint depth. Cat.1 is a light tint made for interiors—open offices, home workspaces, classrooms, airports, and overcast errand runs—so your view stays bright and your eyes remain visible on video calls. For practical context, read Lens category context for indoor wear (Cat.1) and why it’s used.

UV protection (UV400)

OTRA specifies UV400 across lens types. UV400 refers to UVA/UVB blocking and is independent of the category number. Category 1 describes indoor‑friendly visible‑light tint, while darker Cat.2/Cat.3 sun lenses manage bright outdoor glare. If you need a fast refresher while scanning specs, use make a UV decision in under 30 seconds.

Frame measurements: width, height, and nose gap

Compare these numbers to a pair you already love for a “same‑fit” match:

• Frame width (mm): the best predictor of overall fit. A difference under 2–3 mm feels nearly identical; 4–6 mm creates a noticeable change; 7+ mm is a true size shift. For quick face‑size pointers, see Best OTRA blue‑light styles for small, medium, and wider faces.
• Frame height: affects presence on camera and how much of your field the lens covers. Taller lenses can slightly reduce peripheral glare; shorter lenses feel minimal and airy.
• Nose gap: small millimeter changes impact stability. If glasses slide as you look down, try a slightly smaller gap or a keyhole bridge. For desk‑day comfort and pressure‑point tips, read Choosing a frame for all‑day wear at a desk: balance, nose pads, and hotspots. If you have a lower bridge and want extra security, head to Low‑Bridge & Asian‑Fit Confidence: Your OTRA Field Guide to Secure, Flattering Frames.

Material callouts

Acetate reads polished and stable; fine metal feels feather‑light and crisp on camera. Bolder silhouettes make a statement but may add weight at the nose. For camera‑forward days, browse Style picks: minimalist vs. statement blue‑light frames for video calls.

Tint and on‑screen colour

Any tint can subtly shift colour perception. If your work is colour‑critical, preview under your usual lighting and compare scenarios in Do blue‑light lenses change color rendering on screens? Real‑world examples.

Glare and webcam reflections

Bright sources like ring lights can bounce into the lens. Place lights about 45° off‑axis and nudge screen tilt slightly. If reflections persist, try the fast fixes in Troubleshooting glare and reflections on webcams with blue‑light lenses.

Care & cleaning

Keep lenses clear with a quick microfiber routine—skip paper towels and shirt hems. Follow the 60‑second routine in Cleaning blue‑light lenses without streaks (keyboard‑side routine).

Decision matrix: Blue‑light vs. darker sun tints

Use this compact table to align lens category with your light conditions. These are comfort‑oriented guidelines for typical U.S. environments.

If you’re hoping for one pair to bridge laptop days and sunny commutes, weigh the tradeoffs in Blue‑light vs. sunglasses: can one pair do double duty?.

A quick read‑through using three real pages

• Geometric statement, light tint: On BLUE LIGHT - Abby, confirm lens category — Category 1 or a Blue Light callout for indoor use, then check frame width (and that hexagon silhouette) if you prefer a tidy fit.
• Refined cat‑eye for medium faces: BLUE LIGHT - Hazel typically lists Cat.1 with balanced width that suits many medium face sizes; review the nose gap if you’re bridge‑sensitive or spend long hours at a desk.
• Classic, camera‑friendly square: BLUE LIGHT - Frankie pairs an approachable rectangle with Cat.1—scan frame height if you want a little more screen coverage without reading oversized on video.

How to compare blue light glasses before buying

• Width within a 2–3 mm window: Preserves the fit you already like. A 5–6 mm jump meaningfully changes both feel and look on camera.
• Nose gap for stability: A slightly smaller gap can limit slip when you look down; larger gaps sit lighter but may shift more.
• Lens height vs. presence: Taller lenses read bolder on Zoom and can trim peripheral glare; shorter lenses feel minimal and keep reflections less noticeable.
• Material and finish: Glossy acetate reads polished and substantial; translucent tones soften features; fine metal feels light and crisp on camera.
• Your daily setting: For desk‑bound days, prioritize balance and touch points; see Choosing a frame for all‑day wear at a desk: balance, nose pads, and hotspots.

Screen‑to‑evening flow

Many people wear blue‑light frames from early emails to late‑night scrolling. If you’re refining evening routines, read Transitioning from daytime screens to evening wind‑down with blue‑light. For a fast fit‑confidence checklist across activities, save the Comfort & Fit Selection Core Guide: Confident, All‑Day Frames That Love Your Face.

FAQs

• Are blue‑light lenses the same as sunglasses? No. Blue‑light frames are generally Category 1 with an indoor‑friendly tint. Sunglasses use darker Category 2 or Category 3 tints for outdoor glare. For use‑case tradeoffs, see Blue‑light vs. sunglasses: can one pair do double duty?.
• Will blue‑light lenses change how my screen colours look? Slightly. Any tint can nudge perceived colour. If accuracy matters, preview under your usual lighting and scan Do blue‑light lenses change color rendering on screens? Real‑world examples.
• What does Cat.1 feel like indoors? Bright and natural—comfortable for long sessions without the “too‑dark inside” look. If your day includes open sun, pair with a Cat.2/3 sun style or see Blue‑light vs. sunglasses: can one pair do double duty?.
• How do I pick a size if I’m between widths? Start with the width of a pair you already like and stay within ±2–3 mm. For face‑size suggestions, see Best OTRA blue‑light styles for small, medium, and wider faces.
• Can you explain blue light glasses specs in plain terms? Lens colour confirms you’re in the Blue Light family, lens category (Cat.1) signals an indoor‑friendly tint, UV400 covers UVA/UVB, and frame width, height, and nose gap describe fit. Compare those four fields across styles and you’re comparing what actually matters.

Next steps

Shortlist two or three frames that match your width and nose‑gap preferences, then try them on at home (photos and mirrors help; AI try‑on offers a fast first impression). From there, read one focused piece based on your priority: When to wear blue‑light glasses: work, late‑night scrolling, travel or Troubleshooting glare and reflections on webcams with blue‑light lenses. Keep your routine simple and your view clear.