Comprehensive Guide to Choosing and Inserting Contact Lenses: Everything You Need to Know

Beyond improving vision, contact lenses offer a wide range of advantages. They provide a wider field of vision without the interference of frames, allow maximum comfort during sports activities, and are not affected by weather conditions like rain or steam. Additionally, color lenses open up an entire world of aesthetic possibilities, allowing everyone to express themselves in a unique and refreshing way. However, to enjoy all these benefits, it's important to understand the correct principles for choosing, inserting, and maintaining them.

• Daily lenses: These are single-use lenses that you insert in the morning and discard at the end of the day. The main advantage is maximum hygiene – there's no need for cleaning or storage, which significantly reduces the risk of infections. They're ideal for those who suffer from sensitive eyes, allergies, or those who wear lenses only occasionally, such as for sports or special events. The disadvantage is the higher cost with daily regular use.
• Monthly lenses (and sometimes bi-weekly or quarterly): These are reusable lenses that require daily cleaning and storage in a dedicated solution. They're more economical with regular use and offer long-term comfort. It's important to stick to a strict cleaning regimen and replace them on time to prevent buildup of deposits and infections. They're suitable for those who wear lenses regularly and are willing to invest in proper maintenance.

• Toric lenses: Designed to correct astigmatism (cylinder), a condition where the cornea doesn't have uniform curvature, causing blurred vision at different distances. Toric lenses are specially designed to compensate for this unevenness and provide sharp, stable vision.
• Multifocal/Bifocal lenses: Designed for people suffering from presbyopia (age-related vision change), a natural condition that typically occurs after age 40, when the eye has difficulty focusing on nearby objects. Multifocal lenses include different vision zones – for distance, intermediate range, and near – and allow smooth, clear vision at all distances without the need to switch between different glasses.

Colored contact lenses are a wonderful way to enhance your appearance, temporarily or permanently change your eye color, and add a personal touch to any look. They're available in a wide range of colors and patterns, some designed to enhance your eye's natural color, and others to change it completely. It's important to know that even if you don't need vision correction, colored lenses, like all contact lenses, require professional fitting by an optometrist to ensure proper fit and maximum safety. Colored lenses usually come in daily or monthly versions and require the same level of hygiene and maintenance as regular lenses.

The first and most important step in choosing contact lenses is a thorough eye examination by a qualified optometrist. The exam doesn't just determine the lens prescription, but also assesses eye health, measures corneal curvature, pupil diameter, tear quantity and quality, and identifies any existing medical conditions that could affect lens wear. Only after a comprehensive exam can the lens type, material, curvature, and diameter most suitable for your eye be determined. Improper fitting can cause discomfort, dryness, irritation, and even more serious damage.

• Curvature (BC – Base Curve): Refers to the degree of curvature of the lens surface. A curvature that doesn't match your corneal curvature can cause the lens to be too loose (sliding on the eye) or too tight (causing lack of oxygen supply).
• Diameter (DIA – Diameter): Refers to the size of the lens. An inappropriate diameter can cause discomfort, friction, or poor corneal coverage.
• Material: Lenses are made from different materials, with the most common being Hydrogel and Silicone Hydrogel. Hydrogel lenses provide good comfort, while Silicone Hydrogel lenses allow higher oxygen permeability to the eye, which is especially important for eye health with extended wear.

Before any contact with lenses or eyes, you must wash your hands thoroughly with soap and water, and dry them with a clean, lint-free towel. This is the most important step in preventing the transfer of bacteria and infections to your eyes.

• Insertion: Place the lens on the tip of your index finger (make sure it's not inside-out – its edges should point upward, in a bowl shape). Using your other hand, pull your upper eyelid upward and your lower eyelid downward. Look straight ahead and gently place the lens on the center of your eye. Close your eye and open it slowly to ensure the lens has positioned properly.
• Removal: Again, clean and dry hands. Look upward, and using your index finger gently pull the lens downward toward the white of your eye. Gently pinch the edges of the lens between your thumb and index finger and remove it. Avoid using your fingernails.

• Dedicated solution: Use only solutions dedicated for contact lenses, and follow the manufacturer's instructions. Never use tap water, saliva, or any other liquid.
• Rubbing and rinsing: After removing the lens, place it on your palm, apply a small amount of solution, and gently rub with your finger. Rinse again with fresh solution and place in a clean case filled with fresh solution. Empty the lens case of all old solution after each use.
• Case replacement: Replace your contact lens case every one to three months, even if it looks clean. Cases accumulate bacteria over time.