• Mean change from baseline (visit 1) to endpoint (visit 3) in the freezing of gait questionnaire score.
• Mean change in time to perform the timed gait test with versus without the laser feature based on performance at visit 2.

• Mean change in time to perform the timed gait test with versus without the laser feature from visit 1 to visit 3. [ Time Frame: 2-3 months ] [ Designated as safety issue: No ]
• Mean change in falls per month for the period between visit 1 and visit 2 (without laser) compared to the period between visit 2 and visit 3 (with the laser). [ Time Frame: 2-3 months ] [ Designated as safety issue: No ]
• Comparison of the changes in falls and the Freezing of Gait Questionnaire scores for group 1 versus group 2 based on the change from the first month after baseline visit to the second month after the baseline visit. [ Time Frame: 2-3 months ] [ Designated as safety issue: No ]

• Mean change in time to perform the timed gait test with versus without the laser feature from visit 1 to visit 3.
• Mean change in falls per month for the period between visit 1 and visit 2 (without laser) compared to the period between visit 2 and visit 3 (with the laser).
• Comparison of the changes in falls and the Freezing of Gait Questionnaire scores for group 1 versus group 2 based on the change from the first month after baseline visit to the second month after the baseline visit.

The purpose of this study is to gather data to see if the Laser Cane and/or U-Step Walker with laser accessory is more effective in aiding with gait freezing than a regular cane/U-Step Walker in patients who have idiopathic Parkinson's disease.

Freezing of gait is a significant clinical problem in Parkinson's disease (PD). It interferes with daily functioning and quality of life and often results in falls that potentially can inflict serious injury. In recent years, much more attention has been focused on the clinical characteristics of gait freezing, the severity of falls that can result, and the use of visual cues as a possible treatment in order to understand the implications of episodic freezing. Few clinical studies have been done to confirm the clinical observations to date. The laser cane is a device that has been used and prescribed in movement disorder centers as the only form of treatment for freezing of gait. Although it has been shown to be effective in many cases, there is no published data to support what has been observed in the clinic. The proposed study seeks to clarify unanswered questions regarding the laser cane and its efficacy in aiding with episodic gait freezing and falls.

Inclusion Criteria:

• Subjects or a designated proxy have given informed consent
• Subject has been diagnosed with idiopathic Parkinson's disease
• Subject is ambulatory. If a wheelchair is used part-time, it must be used for less than 50% of the time
• Positive assessment for Questionnaire Used to Identify Freezing of Gait in PD Patients at subject's best "on"

Exclusion Criteria:

• Presence of atypical features suggestive of MSA, PSP, ataxia, unexplained or prominent pyramidal signs, and/or autonomic dysfunction
• Subjects who are non-ambulatory more than 50% of the time
• Subjects who have had a history of syncope in the 6 months prior to screening
• Subjects with moderate or advanced dementia