You can enjoy the fun of the VIRTUAL TRY ON option so you can give frames a test drive before committing (simply click on the "TRY ON NOW" button on the bottom right side of any product page).

Knowing how to select frames for your glasses doesn’t have to be daunting or scary. It can be fun, and it will showcase who you are as a person. 

Here is how to select frames:

• Identify your face shape.
• Choose colors that complement your skin tone.
• Consider your way of living.
• Flaunt your personality.

Finding the right frames is easy if you know your face shape, make the right color decisions, consider your lifestyle, and choose what makes you the happiest and most comfortable. These four easy steps on how to select frames will make finding the perfect frames for your face as simple as possible. 

TR90, or Grilamid TR90, is a thermoplastic material first created at the Swiss EMS company. It was initially a transparent granular polymer with some remarkable features. Among these are low density, good chemical resistance, low moisture absorption, high distortion temperature, and incredible flexibility.

Its exceptional characteristics made it the perfect material for many purposes, including eyewear. Over recent years, TR90 frame sunglasses are becoming incredibly popular for the superior benefits they offer.

Polarized lenses are primarily used to reduce the sun’s glare. They have an additional anti-reflective coating of film to filter bright, reflected light as well as ambient light, reducing glare during driving, water sports, and other outdoor activites. 

Non-polarized lenses do not reduce glare as well as polarized lenses, but are equally efficient at protecting against UV rays and offer enhanced clarity when viewing LCD screens on digital devices.

Photochromic lenses automatically get darker in the presence of sunlight. The big advantage of photochromic lenses is their versatility. People who wear them have essentially a pair of eyeglasses and sunglasses rolled into a single set of frames.

TAC lenses are crafted from a multi-layered material known as Triacetate Cellulose. This compound is notable for its clarity and stability, which comes from the same organic polymer family used in photography and LCD screens.

• Lightweight: TAC lenses are incredibly light, providing comfort even with extended wear.
• Polarized Protection: They cut down on glare without distorting colors, making them ideal for outdoor activities.
• Scratch Resistance: They are resistant to scratches, though not as much as glass, they still offer decent protection against daily wear and tear.
• Biodegradable: Being made of an organic polymer, TAC lenses are more eco-friendly than some other synthetics.

Polycarbonate lenses are a synthetic plastic offering high impact resistance, often used in sports eyewear and children's glasses.

• Impact Resistance: They are less likely to fracture, even under tough conditions.
• Lightweight: Perfect for all-day wear and active use without causing discomfort.
• UV Protection: Most come with built-in UV protection, making them a healthy choice for your eyes.

Progressive lenses aid in an eye condition called Presbyopia. This is a very common vision condition that usually starts around the age of 40 and results in the loss of the ability to focus on near things. If you have an add power listed on your prescription you are presbyopic.  As this condition progresses with age people usually transition from wearing single vision lenses to multi-focal or progressive lenses.

High index lenses are thinner, more powerful lenses. They're lightweight and stylish, but are mostly reserved for those with higher vision correction needs. While most prescriptions are compatible with more than one specific index, it's up to you to decide which one fits your personal needs!

The difference between your glasses' lens index can make a huge impact which is why learning about high index lenses’ meaning is important. Deciding which you should get depends on your prescription and your lifestyle. Thicker lenses are more affordable, but can only accommodate lower vision correction needs. Thinner lenses are lightweight (and more stylish!) and can accommodate MANY kinds of vision needs, including higher prescriptions. In terms of balancing price and quality, 1.59 index polycarbonate lenses accommodate most prescriptions and are extra durable.

Please note that a current prescription that includes the doctor’s information, date of service, and signature of the doctor is required to process your order. All prescriptions are checked by our in-house opticians to ensure your glasses are perfect!

During the ordering process you will have the following options:

• Upload the valid prescription as a PDF, JPG, or PNG
• Choose your on-file prescription if you are an existing customer

Send it later - If you choose this option please watch out for an email from official@hatiis.com to assist further.

Your PD is the distance from the center of one pupil to the center of the other in millimeters. This information is necessary to properly center your prescription correctly in your frames. It's important to note that the average PD is between 57 and 65mm. You may have two PD values - one for each eye. It is best to get this measured by your eye care professional.

Here are some terms you’ll see on both glasses and contacts prescriptions:

OD:This abbreviation stands for “oculus dexter,” which is “right eye” in Latin.

OS:This abbreviation stands for “oculus sinister,” which is “left eye” in Latin.

Sphere (SPH):Sphere indicates how strong your lenses need to be. This will be accompanied by a plus (+) or minus (-), which indicates whether you’re farsighted or nearsighted.

Cylinder (CYL):Cylinder is the correction for astigmatism. Astigmatism means that the shape of your cornea prevents you from seeing with perfect sharpness. If you have a cylinder included on your contact lens prescription, that usually means you wear toric lenses.

ADD:This is used when you require a prescription for both distance and reading in your glasses or contact lenses. It can be shown as an ADD value with a plus (+) sign with a number or, for certain contact lens brands, a description like "high" or "low." An ADD indicates that you may need progressive or multifocal lenses. It also may give you the ability to order one of three types of single-vision correction: distance, reading, or intermediate correction.

If you don’t have any medical issues that affect your vision, you should have a comprehensive eye exam every one to two years.

Children should have their first eye exam when they are around six months old, and then another just before they start school. This ensures that they can see clearly in class; poor vision can seriously impact a child’s learning.