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Lens Guide
单光镜片示意图

Single Vision:

Single vision lenses are standard prescription eyeglasses.
Single vision lenses provide only one type of vision correction, with the same prescription strength across the entire lens. They can correct nearsightedness, farsightedness, or astigmatism. This is the most common type of lens.
• Either far • Or near
But ❌ not both at the same time.
👉 Like a camera with a fixed-focus lens.

渐进多焦点镜片示意图

Progressive:

Progressive lenses offer the closest thing to natural vision you can get in a pair of prescription glasses.They provide a smooth transition from near to far vision, incorporating all intermediate corrections to ensure clear sight at every distance.
• Top: Distance vision
• Middle: Computer / intermediate
• Bottom: Near / reading
The near-vision support comes from the ADD (Addition power).
👉 Like a camera lens with smooth zoom.

双光镜片示意图

Bifocal:

A bifocal lens means a lens with two credits of focus. A small portion of the eyeglasses lens is reserved for the near-vision correction. The rest of the lens is usually a distance correction.
• Top: Distance
• Bottom: Near (reading)
✔ Clear for far + near
❌ No smooth intermediate (computer) zone
❌ Visible line between the two parts👉 Like a camera with two fixed focal lengths.

阅读镜片示意图

Reading:

Reading lenses are prescription glasses designed for reading.
They provide optimal vision for reading or other close-up tasks, suitable for objects at reading distances ranging from 16 inches (approximately 40 cm) to 2 inches (approximately 5 cm).
If you notice your vision changing over time, struggle to focus on small print, or simply want to enhance eye comfort while reading, reading lenses can be highly beneficial.

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Sylvia

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Black Oval Eyeglasses

Frame Color: Black
Eydology Sylvia Black Glasses 3 Eydology Sylvia Dark Tortoise Glasses 1 Eydology Sylvia Clear Green Glasses 3 Eydology Sylvia Clear Brown Glasses 3

$25.99 $17.99

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    • Shipped today? Order within: May 15, 2026 17:00:00 -0700
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    PrescriptionPrescription
    • Single vision
    • Progressive
    • Polarized
    • Non-polarized
    • Reading
    • Bifocal
    Sylvia Size Medium
    product spec click Lens Width 48 mm 1.89 inch
    product spec click Bridge 18 mm 0.71 inch
    product spec click Temple 146 mm 5.75 inch
    product spec click Width 129 mm 5.08 inch
    product spec click Lens Height 38.2 mm 1.5 inch
    Show in Inches Show in MM
    Size Width (mm)
    S (Narrow) 125-128mm
    M (Medium) 129-132mm
    L (Wide) 133-136mm
    XL (Extra Wide) 137-140mm

    We suggest you measure your frame dimensions to make sure your new glasses correctly fit your face.

    Sylvia

    Black Oval Eyeglasses
    $17.99 $25.99
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    Details & Size
    Description
    Shipping & Returns

    Product Details

    Sku: A1065-01
    Rx Range: -20.00~+10.00
    PD Range: 52–68 mm

    Pupillary Distance (PD) is the distance, in millimeters, between the centers of your pupils. It is required to position the optical center of your lenses for clear and accurate vision, especially for prescription and progressive lenses.

    Please note that the recommended PD range refers to Single PD, which is the total distance from one pupil to the other.

    If your prescription lists Dual PD (two numbers, e.g., 31/32), simply add them together to convert it to Single PD.

    Example:
    Dual PD: 31 / 32 → Single PD: 63 mm

    If you don’t know your PD, you can learn how to measure it here.
    Material: Acetate
    Adjustable Nose: No
    Spring Hinge: No

    Frame Size

    Glass Size: Medium

    S (Narrow):
    Frame Width 125-128mm
    M (Medium):
    Frame Width 129-132mm
    L (Wide):
    Frame Width 133-136mm
    XL (Extra Wide):
    Frame Width 137-140mm
    Frame Weight: 22.8 g

    All EYDOLOGY frame weights are measured without lenses or fillers, excluding non-prescription plano sunglasses frames.

    Ultra-Lightweight: Frame weight under 15g.
    Lightweight: Frame weight under 20g.

    Frame Width: 129 mm
    Bridge Width: 18 mm
    Lens Width: 48 mm
    Lens Height: 38.2 mm
    Temple Length: 146 mm

    Frame measurements

    Glass Frame Size IconGlass Temple Length Icon
    Show in inches
    129 mm
    48 mm
    38.2 mm
    18 mm
    146 mm

    Sylvia's black frames showcase a timeless classic style. Crafted from lightweight yet resilient materials, they offer comfortable wear without pressing on the nose, ensuring ease even during extended use. Suitable for any occasion.

    Shipping

    Order Processing & Production: 1-5 days (Complex lenses may take longer, such as photochromic lenses)

    Free Standard Shipping

    We're making shipping easier for you! Enjoy free standard shipping on product orders over $79.00 to the following countries: [USA].

    • Who Qualifies: Orders of $79.00 or more (before shipping fees).
    • Shipping Type: Standard shipping.
    • No Extra Steps: No coupon code needed, discount applies automatically at checkout.

    Shipping Time
    Standard Shipping: 7–19 days

    Visit our Shipping Policy page for more information.

    Returns

    We are committed to providing a positive shopping experience for our customers at Eydology. If you are not completely satisfied with your purchase, you may return:

    • For requests made within 30 days of receiving your order, you can choose between a refund to your original payment method or a store credit.
    • It is not possible to process a request for a credit/refund for non-quality issues if the request is made outside of this 30-day window.
    • Each order is eligible for a one-time exchange/return. Please kindly note that the "exchange order" is not eligible for another exchange/return.

    The original shipping fee of the order is non-refundable. Please ensure the items are in original condition, with the original case and tags. If there is a complimentary item in the order, it needs to be returned together.

    Visit our Returns Policy page for more information.

    • Our Packaging

      Our Packaging

      Every pair comes with a protective case, cleaning cloth, and detailedcare guide to keep your glasses looking great.

    • Our Frames

      Our Frames

      Premium material offering rich colors and patterns. Lightweight and hypoallergenic. Perfect for all-day comfort and style.

    • Our Lenses

      Our Lenses

      We have a variety of lenses for you to choose from, and all lenses are high definition and will not affect your vision.

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