Internal ACD Measurement Tools in Ophthalmology

Preparing for Measurements with Digital Caliper

• The eye should be pre-treated before taking measurements with the Digital Caliper.
• The patient should be in a seated position when taking the measurement with the Digital Caliper.
• The Digital Caliper measurement should be taken from the white-to-white (w-to-w) of the eye.

Validating Caliper Measurements

• The caliper measurement of the w-to-w should be validated using a keratometer or IOLMaster.
• If there is a discrepancy in the w-to-w measurement between eyes, the measurement should be re-taken and re-validated.

Reading Caliper Measurements

• When using the Digital Caliper, the caliper measure should be read in a way that is perpendicular to the eye.

Measuring W-to-W and Vault of PC-PHAKIC IOL

• One method to measure the W-to-W and vault of PC-PHAKIC IOL is by using a digital caliper.

Complications of High and Low Vault

• High vault post-operatively can cause glare and halos.
• Low vault post-operatively may cause peripheral touch.
• If high vault exceeds 1000 microns, a management approach can be taken to reduce the vault.
• The regular limit for low vault measurement is 100-150 microns.

Managing Low Vault

• If there is peripheral touch despite a central vault of 100 or 150 microns, a low vault can be managed by adjusting the vault height.

Measuring Internal ACD for EYECRYL™ PHAKIC IOL

• The recommended minimum internal ACD measurement to avoid errors when using the EYECRYL™ PHAKIC IOL is 12.5 mm.
• Tools that can be used to measure ACD for proper evaluation before using the EYECRYL™ PHAKIC IOL include the IOLMaster and ultrasound.

Importance of Measuring IOP and Screening for Glaucoma

• Measuring Intra-Ocular Pressure (IOP) is important when considering the use of PC Phakic IOL like EYECRYL™ to avoid complications.
• Screening tests should be performed to evaluate the risk of Glaucoma before using the EYECRYL™ PHAKIC IOL.

Evaluating Dry Eye Condition

• It is important to evaluate dry eye condition before considering the EYECRYL™ PHAKIC IOL to avoid complications.

Discontinuing Contact Lenses before Corneal Topography

• Soft contact lenses should be discontinued for 7 days and RGP contact lenses for 30 days before corneal topography when planning to use EYECRYL™ PHAKIC IOL.