Is it better to choose a plastic ruler or a metal ruler? How to use it?

I have bought both materials. I bought a metal ruler at first, but its edges are sharp. I almost hurted my child's face, so I changed a plastic pd ruler. It is transparent, measurement can be clearer and more accurate. It did not come with instruction, but I can easily get the manual video from Google.

How do you use this? I need to order glasses online for myself and my children and I cannot figure this out.

I googled it, watched a YouTube video if I remember correctly. No instructions came with mine, so pretty annoying.

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Pupillary Distance Ruler for Eyeglasses

Product ID: 205810363

Details

Brand
Ultrassist
Color
Transparent
Graduation Range
1 millimeters
Material
Polyvinyl
Style
Classic Edge

📏1mm precision graduations

🔍dual monocular & binocular PD scales

🛡️transparent flexible PVC design

R$102

Duties & taxes included

In stock

Sold byAmazon BrazilDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

Buyer Protection · Full refund if your order doesn't arrive as described.

Desertcart purchases this item on your behalf and handles shipping, customs, and support to Brazil.

Secure transaction

Description

📏 Measure Like a Pro, See the Difference Instantly!

SEE THROUGH FOR PERFECT ALIGNMENT - Transparent PVC lets you align pupils without guesswork, guaranteeing accuracy every time.
DUAL BINOCULAR PD MADE EFFORTLESS - Easily capture both single-number binocular and separate right/left monocular PD values with intuitive scales.
STEP BY STEP ENGLISH GUIDE INCLUDED - Master the measurement process quickly with a detailed PDF guide, minimizing errors and boosting confidence.
PINPOINT PRECISION IN EVERY MILLIMETER - Clear 1mm graduations ensure exact pupillary distance measurements for flawless eyewear fitting.
LIGHTWEIGHT FLEXIBLE AND BATTERY FREE - Comfortable to use and eco-friendly—no electronics, apps, or sliding parts needed.

The Ultrassist Pupillary Distance Ruler is a transparent, flexible PVC tool designed for precise measurement of pupillary distance with 1mm graduations. It supports both binocular and dual monocular PD readings, making it ideal for accurate eyeglass fitting. Lightweight and battery-free, it comes with a comprehensive English user guide to ensure professional-level results every time.

Specifications

ASIN	B0842NXQ3P
Best Sellers Rank	#69,478 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #25 in Low Vision Eye Charts
Brand	Ultrassist
Brand Name	Ultrassist
Color	Transparent
Customer Reviews	4.1 out of 5 stars 493 Reviews
Graduation Range	1 millimeters
Item Highlight	Transparent PVC design measures single or dual PD from 46–84 mm, with three scale options
Manufacturer	Ultrassist Direct
Material	Polyvinyl Chloride (PVC)
Material Type	Polyvinyl Chloride (PVC)
Model	Geeloa
Number of Items	1
Part Number	ul0034
Style	Classic,Straight Edge,Flexible
Style Name	Classic,Straight Edge,Flexible
UPC	690770572380
Unit Count	1 Count

Common Questions

Are the products genuine and authentic?+

Yes, all products are sourced directly from authorized retailers in the US, UK, UAE and India. We maintain strict quality control processes and verify each product before shipping. All items come with applicable manufacturer warranties and are covered by our standard return policy.

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Delivery times vary by destination country, typically ranging from 3-9 business days. Each order is fully trackable through our system. We handle all customs clearance and use reliable courier partners for last-mile delivery. You'll receive regular updates about your order status via email and our app.

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Desertcart is an international e-commerce platform operating since 2014. We securely process thousands of orders globally each day. Every product goes through our quality verification process before delivery, and we provide end-to-end order tracking, 24/7 customer support, and a comprehensive returns policy to ensure a safe shopping experience.

How is product pricing calculated?+

Our prices include the product cost, international shipping, import duties, customs clearance, and local delivery charges. We handle all customs and import procedures, ensuring there are no hidden fees upon delivery. PRO members receive additional benefits including free shipping.

Trustpilot

TrustScore 4.5 | 7,300+ reviews

Ayesha M.

The product exactly matches the description. Very satisfied with my purchase.

5 days ago

Meera L.

Smooth transaction and product arrived in perfect condition.

3 weeks ago

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R$102

Duties & taxes included

In stock

Sold byAmazon BrazilDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

Buyer Protection · Full refund if your order doesn't arrive as described.

Desertcart purchases this item on your behalf and handles shipping, customs, and support to Brazil.

Secure transaction

Trustpilot

TrustScore 4.5 | 7,300+ reviews

Ali H.

Fast shipping and excellent packaging. The Leatherman tool feels very premium and sturdy.

1 day ago

Sneha T.

Received my product in pristine condition. Great service overall.

1 month ago

View all Trustpilot reviews