Contact Lens Insertion and Removal Training: Techniques for Soft and GP Lenses

The Importance of Proper Training

Teaching patients to safely insert and remove their contact lenses is one of the most critical steps in the dispensing process. Poor technique leads to corneal abrasions, lens damage, anxiety, and ultimately patient dropout. A well-structured training session builds confidence and establishes habits that protect the patient's ocular health for years of successful lens wear.

The techniques differ significantly between soft contact lenses (SCL) and gas permeable (GP) lenses due to their distinct physical properties. Soft lenses are flexible and drape over the cornea, while GP lenses are rigid and sit on the tear film.

Pre-Insertion Preparation

Regardless of lens type, every insertion begins with proper hygiene:

• Hand washing: Wash hands thoroughly with a non-moisturizing, fragrance-free soap and dry with a lint-free towel
• Nail check: Short, smooth fingernails reduce the risk of lens damage and corneal scratches
• Environment: Work over a clean, flat surface (or a mirror laid flat) to catch dropped lenses
• Consistent routine: Always start with the same eye (typically the right) to avoid mixing up lenses with different prescriptions

Soft Contact Lens Insertion

Step-by-Step Technique

1. Place the lens on the tip of the index finger of the dominant hand
2. Inspect the lens for debris, tears, or defects
3. Perform the inversion check (see below)
4. Use the middle finger of the same hand to pull down the lower lid
5. Use the index or middle finger of the opposite hand to hold up the upper lid
6. Look straight ahead or slightly upward
7. Gently place the lens on the eye, centering it over the cornea
8. Release the lower lid first, then the upper lid
9. Blink gently to center the lens

The Taco Test (Inversion Check)

Before inserting a soft lens, you must verify it is not inside out. The taco test is the most commonly taught method:

• Correct orientation: When gently squeezed from the edges, the lens forms a smooth "U" or "taco" shape with the edges pointing straight up
• Inverted: The edges flare outward, creating more of a saucer or soup bowl shape

Some lenses also have laser markings (such as "123" or the manufacturer's initials) that read correctly when the lens is properly oriented. If the markings appear reversed, the lens is inside out.

Soft Contact Lens Removal

The Pinch Method

This is the standard removal technique for soft lenses:

1. Look up or to the side
2. Use the index finger to slide the lens down onto the lower sclera (white of the eye)
3. Pinch the lens gently between the thumb and index finger
4. Lift the lens away from the eye

Sliding the lens off the cornea before pinching reduces the risk of corneal pinching and is more comfortable for the patient.

GP Lens Insertion

GP lens insertion follows a similar approach to soft lenses with a few key differences:

1. Place the lens on the index fingertip with a small amount of conditioning or wetting solution in the bowl of the lens
2. Hold both lids open firmly (GP lenses are smaller and can slip under a lid if not controlled)
3. Look straight at the lens and bring it directly onto the cornea
4. Release the lids gently

Because GP lenses are smaller than the corneal diameter, precise centering is important. The tear film helps hold the lens in position once properly placed.

GP Lens Removal

GP lenses cannot be pinched like soft lenses. Two primary removal methods are taught:

Eyelid (Blink) Method

1. Open both eyes wide
2. Place one finger at the outer corner of the eye (temporal canthus)
3. Pull the skin laterally (toward the ear) to tighten the lids against the lens edge
4. Blink firmly
5. The lid tension breaks the tear film seal and pops the lens out
6. Cup the free hand below the eye to catch the lens

Suction Cup Method

1. Moisten the suction cup with wetting solution
2. Center the cup on the lens surface
3. Press gently to create suction
4. Pull straight out to remove the lens

Teaching Strategies

Effective patient training goes beyond demonstrating the technique:

• Demonstrate first: Use a model eye or video to show the technique before the patient attempts it
• Guide verbally: Talk the patient through each step as they practice
• Allow adequate time: First-time wearers may need 30-45 minutes for training
• Practice both insertion and removal: Ensure the patient can perform both independently before leaving the office
• Document proficiency: Note in the chart that the patient demonstrated successful insertion and removal
• Provide written instructions: Give the patient take-home instructions for reference

Key Takeaways

• Hand washing with non-moisturizing soap is the essential first step for all lens handling
• The taco test verifies soft lens orientation before insertion
• Soft lenses are removed by sliding onto the sclera and pinching
• GP lenses are removed using the eyelid blink method or a suction cup
• Never use a suction cup on soft contact lenses
• Document that the patient demonstrated proficiency before dispensing